I tend to reserve mine for business cards when I am going to meet someone new. Occaisionally a pen will go there, maximum of one on a temporary basis. On rare instances a floppy disk will drop in too. I have a colleage who stashes about 10-15 pens into his shirt pocket, often with a plastic bag to line it. He once told me he was a 'pen enthusiast' but I still think it is a little nerdy. What's in your shirt pocket?