I always always wear my watch, because I feel naked without it.

I also wear a "CTR Ring", which is a piece of jewelery that silly Mormon kids such as myself get at church when they're little, reminding them to make good choices (CTR = Choose the Right). Mine is a fairly fancy version, though. My parents got it for me several years ago, and I wear it every day.

That's all, though. I was never big on jewelery, I don't even have my ears pierced.