When you travel, you might traditionally send a handful of postcards to family and friends. How about sending a postcard to yourself? Use the best picture postcard you can find and write to yourself about the most interesting person you met on your trip (or on each stop in your itinerary). Most postcards cover where you went and what you saw. A postcard to yourself about an engaging, unusual or compelling person you met can capture what makes travel so interesting -- the people!
Over the years, the "postcards to yourself" can serve as a collected journal of the special people you crossed paths with in your travels, plus photos and cancelled stamps to also remind you of your journeys.