I'm sort of a simple commuter. My commute (going the long way on a MUP) is 10 miles one way. I ride either one of my bikes. Lately its been my Motobecane road bike just for the speed.

I shower before I leave the house, and wear padded lycra boxers under "normal" shorts. Then a normal t-shirt, a hoodie if its cold (I'm currently a fair weather rider). I wear cycling shoes for the stiffer sole, but no longer clip into my pedals due to having bad knees.

I get to work, park/lock the bike, then go and rinse off in the work shower. I change into clothes I've packed into my trunk bag (or panniers on the mtn bike), and the shoes I keep at my desk. This has been needed lately as its hot as hell outside and I have to wear long pants @ my job. I let the cycling gear dry in a locker before pedaling home 9 hours later. (I eat lunch @ my desk).