Model 649, a pocket knife, a wallet with actually cash in it, and way too many keys. I'm just too old and too set in my ways to opt for one of the light weight, plastic fantastic, DAO, semi-autos in .32 or 380, as nice as some of them may be.
When I am not feeling too lazy to mess with it, or when traveling, I will carry a 3913 in an in the waste band holster, but mostly it is a 649 in the pocket. I have never been a bit uncomfortable with either of them.