I've done just the opposite as I've traveled quite a bit for my job. As I go to new cities, towns, and countries, I'll drop a letter or postcard in the mail back to my family. I try to use the hotel stationary or find a local postcard. My intention has always been to someday create an album mixed with photos and covers. The only problem I've had recently is the centralization of canceling stamps, both in the US and other countries - assuming they even get canceled. I now walk into a post office and ask for a hand cancel where possible.
Here is a cover from a trip my wife and I took to Iceland. I found the envelope in a local art shop on this trip.
