I can't fit all my commuting crap into my 1000 cubic inch pannier. I could fit everything I need and more if it weren't for the clothes; they take up a lot of room. I can't leave 5 days' worth of clothes at work though because then I wouldn't have anything to wear at home, plus there's nowhere at work to keep a pile of clothes. Once I lock up my bike, I have to take everything off of it, so I have to carry that in the bag too, at least for awhile. Then on the way home from work, I have yet more stuff to carry, because it's warmer so I need fewer layers on my body. There's just too much stuff! When I change in the bathroom, I have 3-5 plastic bags full of crap I have to rummage through, from both my pannier and my locker, and it takes forever.
So I have to ask...
What do you bring with you on your commute?
What do you keep at work?
What do you have two of (i.e., one at home, one at work)?
How do you organize your bag or pannier?
Interested in what you guys have to say. It'd be especially helpful to hear from people who have just a small bus-station-type locker to store things in. Thanks!