what do you do?

[lattae]

I bike to work on occasions... approximately 4 miles each way. I'd bike in my jersey and biking shorts and keep my clothes and scented wipes in a locker at work. I never showered but would wipe myself down with the wipes and that was sufficient to feel fresh. I do sweat profusely so on the hot and humid days it does take a bit of time to finally cool off. I felt very clean and fresh after wiping down my entire body with the scented wipes.. they are wonderful to use for occasions like that. I had no complaints of offensive odors from anyone, in fact, I was probably cleaner than some of my co workers

[Geonz]

I, too, don't want to be tossing that many wipes into the system of life. I have a little tub in my bottom desk drawer with the necessities. Take 'em into the handicapped stall where there's room (run the washcloth under the sink, first).

Thankfully my hair wouldn't frizz unless I stuck my hand in an electric socket... not sure it would even, then. It does sometimes do the cowlick-in-the-air thing so I hit it with a wet comb (it's generally already damp unless I was really lazy) and mash the helmet back down on it for going into the office, which helps it flatten, then use that little mirror on my shelf to whip it into shape.

[Becky]

I don't get very sweaty on the ride to work, so a quick wipe down with a towel and some fresh deodorant is enough to keep me stink-free. I do keep some baby wipes at the office, just in case. Panniers are a godsend for cutting down on the sweat.

As for the hair, I chopped it all off. The longest pieces are about 2" long, and dry in the time that it takes me to get dressed. A little gel or pomade is all it takes to style. A skull cap keeps the hair from getting sucked up through my helmet vents, and helps wick away sweat too.

[Fontinalis]

I make sure I get to work a good 15 minutes earlier, so I have time to change if needed, and freshen up, and calm down too, if the commute got me working out.
I most often will wear, under my work clothes, a layer that will sort of 'soak up' any sweat, a layer that I can take off once at work. As for my commute back, I don't worry about it since I am getting back home, so getting there sweaty is not a problem.
That layer will often consist of biking undergarments (biking underwear from Juniona and a simple cotton tee).
I hope this helps.

[tulip]

Everyone has great suggestions. With only a 3 mile commute, you shouldn't have any problem freshening up.

Here's what I did: When I worked in an office without a shower (only for a year, and then took a job with a bike rack in the lobby and a commuter shower!), I got there early for plenty of cool-down time, kept a small towel and washcloth at my desk, freshened up in the bathroom with a cool washcloth, washed my hair in the sink and blow-dried it (kept the dryer in my desk), and did all the other stuff like makeup, and no one was the wiser. I either brought my clothes with me in a pannier or kept some at work in a closet. I always kept a few pairs of work shoes at work. My commute was 12 miles each way.