Yay to you for commuting! How many miles/km is that, wondering? And what kind of bike do you have?

I'm sure the more experienced cyclists will have tips for you, but there's a thread I started regarding my saddle problems, so take a look at that. Many suggested raising the saddle. While it's hard to tell if yours is too low without a picture, there are some rules of thumb the others on the forum told me in terms of how high I should be on my bike:

http://forums.teamestrogen.com/showthread.php?t=33624

I'm also assuming you have a basic emergency kit -- tools, tube, pump/co2, and an energy bar.