I can easily pack a change of "work clothes" (used to include dress shoes), toiletries, camp towel and lunch in a small backpack or largish messenger bag. Havin

I can easily pack a change of "work clothes" (used to include dress shoes), toiletries, camp towel and lunch in a small backpack or largish messenger bag. Having a shower available is strongly recommended, however. Built-in in hydration for the backpack isn't a bad idea either. I've gotten lazy and haven't biked in in awhile, but I used to do it every day by heading into work about 30-45 minutes earlier than I would drive, swapping my shower immediately after I got up for showering at work, and compensating for a slightly longer commute. If you compare the amount of time you'd spend driving to a gym, working out, then driving somewhere else, it's a no-brainer, bike commuting kills two birds with one stone and saves you gas money. Or you can try what I did for a while and get up even earlier to bike to the gym, workout, shower, then bike to work, using the cycling as warmup and cool down for the gym workout.