It's rather dorky but I collect fridge magnets, I started collecting them because the kids would bang the door into the fridge and it developed a dent which I covered with a fridge magnet. I used to collect netsuke but when I left my husband I practically went with just the clothes on my back and I never bothered asking for them. What do you collect - if you collect replicas of star trek swords for god's sake don't admit to it