Scrapbooking
Even though it may be a little more time consuming, the memories made in a scrapbook are extremely special and looks very nice. Scrapbooking is also a very relaxing hobby for a lot of people and you are preserving memories at the same time! Another thing to keep in mind is it can get a little expensive. Stickers and paper and the actual scrapbook all adds up, so add up the costs before you dive right into it!
Travel Box
This is a bit of a cheaper way to keep travel memories, but it isn't a nice lade out book like a scrapbook, it can be a bit messy all in the box. But, the boxes can look really cool as decor items and the memories are still organized from your different destinations!
Postcards
This is a fun way to remember the destinations you've traveled to, but it isn't a way to keep all of your travel memories, so I recommend using another way as well as postcards to preserve your travel memories. Sending post cards to yourself is a cool memento to look back at!
Travel Journal
This is a really great way to remember the things you did at each place you've visited traveling. This takes an immense amount of work to be constantly writing everyday or every couple days when your on a trip, but the outcome is worth it, trust me. Looking back, I am so happy that I kept a journal traveling, because it is easy to forget some of the experiences you've had and it has always been important to me to preserve as much of my travel experiences and memories as possible.
Create Your Own Travel BLOG
This is my most highly recommend way to preserve all of your travel memories. You can access your blog from anywhere in the world as long as you have a computer and internet and it is extremely organized and its FREE! It can still be a bit of work, but you will be so happy you did it! You can use Wix.com, blogspot, Wordpress and many others!