• I traveled to the UK, the Netherlands, and France during my recent European vacation.
• I planned a packed itinerary, and was pleasantly surprised that I fit so much into eight days.
• That said, I wish I'd booked our hotels sooner and done research into customs and security.

Ever since my first trip to France at 18, I've been enamored with Europe.

Don't get me wrong, I love exploring the US, but there's something about leaving the country that helps me dive into vacation mode quickly, since I'm an ocean away from life's daily stressors.

After the COVID-19 pandemic, I started feeling a familiar itch to travel abroad, so we visited France together two years ago. The following year, we upped the ante and headed to two countries: France and Italy.

When it came time to plan our annual vacation this year, I proposed our most ambitious one yet — three European countries in eight days with a travel day tacked onto both ends — then mapped out a whirlwind itinerary that included two full days in London and two and a half days in both Amsterdam and Paris.

It was an adventure of a lifetime, and we packed so much into a short period of time. Still, I made a few mistakes and learned several important lessons along the way.

I didn't do enough research on security and customs protocol

When we traveled from London to Amsterdam on the Eurostar train, it took an hour to get through airport-level security and customs. Since I anticipated a similar experience traveling from Amsterdam to Paris, we arrived at the train station extra early, but there was no security checkpoint.

This minor mistake only cost us an hour of wasted time, but I regretted it. I could've hopped on an earlier train to Paris had I known that traveling from one EU country to another is a lot easier than entering the European Union from the United Kingdom.

With a tight itinerary, minutes and hours matter, so I learned to pay more attention to security requirements during the planning stage.

I waited too long to book one of my hotels

When looking into Amsterdam hotels, I found one in the city center, right near the main train station. I usually book things well in advance, but this time, I took a gamble and waited to see if the prices would drop.

By the time I went to book my preferred hotel, no rooms were available for my travel dates. As it turns out, there were a few big events in town that week, so rooms filled up quickly.

I've had luck finding last-minute deals on Booking.com before, so I took a look and booked another hotel that was a quick train ride away from the city center. Everything worked out, but the experience taught me to always research whether there are major events going on in a city when you're traveling.

After all, you can always book the hotel when you see it, then cancel the reservation and rebook it if prices drop.

I learned you can't see everything in one trip, and you don't have to

When you only have a few days in a city, you're forced to home in on the must-see items on your bucket list rather than seeing every major tourist attraction. For instance, my husband and I aren't into art, so we usually skip art museums and seek out cool architecture, beautiful gardens, and meaningful experiences.

When we first started charting our own course on vacation rather than letting the fear of missing out guide us, we worried that we might regret seeing some of the major sights. But we quickly realized that it's freeing to pick and choose the activities that matter most to you.

In Amsterdam, we could've seen the Anne Frank House since it's a popular tourist spot. Instead, we spent an afternoon at the Heineken Experience in honor of my late father, who adored Heineken.

I don't drink beer, but it was still incredibly rewarding to enjoy an experience that he never got to have himself.

Walking is often the best way to see a city — but don't be a hero

Whenever I travel, I prefer to see new cities on foot rather than spending time (and money) on public transportation.

Since we only had two days in London, my husband and I took the scenic route to Kensington Palace and walked an hour from our hotel.

On a nice day, it would've been a lovely walk through a gorgeous park, but London's weather is unpredictable. It ended up being rainier and windier than we'd expected, making the stroll pretty miserable.

Sure, we could've popped into the nearest train station, but the intermittent rain lulled us into a false sense of security. Next time, I'll hop on a train instead, even if it means missing out on seeing a pretty park.

• There are a few mistakes I wish I'd avoided before and during my family's trip to South Korea.
• I wish I had planned more hikes, purchased a transit card sooner, and spent more time outside Seoul.
• Looking back, I wish I'd taken more time to learn about local history and music.

When I was planning my family's summer trip to Japan, a stop in South Korea wasn't originally part of the itinerary.

However, when I found a great deal on premium-economy tickets to Tokyo with a layover in Seoul, I decided to extend our stay in South Korea's capital and spend five days exploring the city.

My children and I ended up loving South Korea, but our trip probably would have been better if I'd avoided these five mistakes.

We should've sought out more hikes and planned experiences within nature.

Seoul is an energetic, bustling city. Before the trip, I had assumed we'd spend most of our time visiting urban attractions and learning more about the flashy local Gangnam Style.

However, the mountains and natural beauty in Seoul made a bigger impression on me than anything else in the city.

By sheer luck, I'd booked a stay at a hotel right by Namsan Park, a massive forest in the mountains inside city limits. My family took two long, unplanned hikes in the park — and they turned out to be some of the best parts of the trip.

Although I'm glad we stumbled upon this urban oasis, I wish I had been more intentional about planning to explore more natural attractions in and around Seoul during our visit.

Our itinerary didn't include enough trips and experiences outside Seoul.

During the trip, my family explored Seoul's ancient palaces and steeped ourselves in K-pop culture. We walked laps around Seoul's trendy Myeong-dong neighborhood, eating Korean street food, hunting for K-beauty finds.

We left Seoul twice for day trips to the Demilitarized Zone (DMZ) between North and South Korea and to visit K-drama filming locations.

Since South Korea wasn't our final destination, I thought five days would be enough to get a feel for the country.

It certainly felt like enough time to explore Seoul, and I loved my time in South Korea — but I left wishing I had more time to explore the country beyond its capital.

For example, I would've loved to visit the volcanic Jeju Island or the beaches and mountains in Busan.

Learning a bit more about local history and culture would've enriched the trip.

When I travel, I usually make it a point to learn more about the place I'm visiting since doing so always enriches my experiences.

However, once I landed in Seoul, I realized how little I really knew.

For example, I wish I'd taken more time to learn about the Japanese occupation of Korea and the Korean War. There are echoes of these events everywhere, and families in Korea remain divided between the North and South.

I also wish I'd become more familiar with popular local bands and listened to more K-pop before I landed. This music is a vital part of Korean culture, and ads with K-pop bands and signs wishing a K-pop star a happy birthday were all over Seoul during my visit.

It would've been cool to understand and appreciate these references … and maybe even sing along to some local hits.

It took us a little too long to embrace local convenience-store culture.

Convenience stores are ubiquitous in Seoul, and the ones we encountered were nothing like the ones back home, which often feel like a last resort for a grab-and-go bite.

Here, convenience stores are staples for a reason. I was impressed by the wide variety of affordable meals, snacks, and beverages on offer in these stores — and by the fact that many of them had seating areas.

By the end of my time in South Korea, I had grown accustomed to eating quick, low-cost, delicious (and sometimes even healthy) meals at a table inside a convenience store with my kids.

Doing something like this is nearly unheard of in the United States, and I wish I had embraced this quintessentially Korean habit much earlier. That way, we could've saved some money on food and efficiently tried even more local favorites.

Getting a transit card at the airport would've saved me money and headaches.

For most visitors, Seoul's extensive public-transportation system is the best way to get around the city. However, using it came with some unexpected challenges.

On my first full day in Seoul, I wanted to take the bus. However, I found that I had no way to pay since physical transit cards aren't sold at bus stops and buses don't accept cash or credit cards.

I got where I wanted to go by taking an Uber instead. Paying a few extra bucks wasn't the end of the world, but I love taking public transportation when I travel, and wish I'd been better prepared.

Even though I was exhausted when I landed in Seoul, I should've taken a few minutes to buy a transit card before leaving the airport to make using public transportation easier.

After I picked one up partway through my trip, getting around the city was easy and affordable. (The card I purchased is "Squid Game"-themed, which also makes it a cool souvenir.)