I carry an Altoids tin full of picks, different thicknesses, fingerpicks, etc, metal, plastic, and keep it in my back pocket like a snuff can. Probably 60-70 picks.

Yep, got set up at a homeless shelter once, sweating like a stuck pig, grabbed my guitar (I was lead guitarist for a fairly new band and I was new to lead guitar) and forgot my picks! I had to go all the way home to get some and since then I've never been without. I have picks on a keychain, picks in each gig bag, each guitar case, I have picks in my pockets, picks in my billfold, picks in my ashtray/changetray of every vehicle, and usually chew on a pick just so that I don't ever leave home without them.