I've seen several people mention using a foam roller to help tight muscles, so I looked into it and tried it. WOW. This is the most awesome thing, it gets deeper into your muscle than any human being could press, and the best part is, once you get a roller, you can do it anytime and not ever have to pay for a massage again.

I found this site that lists exercises you can do with it:

http://sportsmedicine.about.com/od/flexibilityandstretching/ss/FoamRoller.htm

I got my roller from a physical therapist who was going to throw it away (free), but apparently you can buy them online, too.