My commute is only 6 miles but I don't wear office clothes even though our office is fairly casual and our weather is mild. It's just too tough on the clothing and I frankly don't find it comfortable. I often wear a skort for my commute so I feel a little less exposed when walking around the building before I've changed. And I carry my lunch and my clothes in my panniers, so I don't have to 'plan ahead' at all. I keep extra underwear, shoes, toiletries and a towel at my desk so I don't have to carry that stuff.

Showering at home and driving to work costs me about the same amount of time as biking to work and then showering there...so it's a fairly even trade. I just hate that there are things I've committed to doing that keep me from biking to work a couple of days a week. I'd LOVE to get into a daily habit!