Every time Brad and I travel somewhere, we pick up a souvenir magnet. When we get home, I take a silver Sharpie and write the month and year and the special occasion for the trip if there was one on the back of it. It's always fun to glance at the side of our fridge and be immediately transported back to those memories. I love the constant reminders of fun experiences we've shared together.
Second-priority traveling souvenirs are always Christmas ornaments. We don't pick one up every time we go somewhere, but we do as often as we can remember / can afford it / can find one. It's so fun to jump back in time every holiday season as we decorate our tree to remember fun times.
Do you collect anything, or is there one thing that you just have to get when you visit a place?