The idea of not paying for parking was a huge inspiration for me to commute by bike and it doesn't really take me longer to bike than to drive (I have a short commute or 4 miles each way).

I keep extra shoes and clothes at work in case I forget to carry something. My biggest blunder involved biking in and unexpectively being called into a judge's chambers when all I had with me was my I don't have to go to court today biking clothes on.