Well, I'm probably not the best person to ask about hair.....seeing as I chopped it all off about a month after I started bike commuting

When it was longer, I kept a spray bottle of water, some hair goop, and a cheap blow dryer at work. Wet it down, goop it up, and blow dry. Now I just dampen it, brush out the "helmet wrinkles", let it air dry, and add some pomade after it's dry.

Do you have a place to stash toiletries, a pair of shoes, spare underwear and socks, etc.? (You might have answered this already- sorry!) I keep duplicates of all of my normal toiletries in a file drawer at my desk- less stuff to carry or forget!