If you have followed my posts over the last year you will have seen lots of links to videos of people using foam rollers to help relax overly tight soft tissue. Here is another video demonstrating self myofascial release techniques with the foam roller:
Cheap foam rollers break down pretty quickly so I have created an inexpensive, durable DIY alternative. It requires a two foot section of two inch diameter pvc pipe, some weather stripping foam, and (drum roll) duct tape.
Wrap the middle section of the pvc pipe with the foam weather stripping and then cover it with duct tape. The foam may break down, but it can easily be replaced, the pvc should last pretty much forever. I spent about four dollars for ten feet of pipe (cut into two foot sections), and about three dollars and fifty cents on the foam. I already had the duct tape so I spent less than eight dollars total. The entire project took about ten minutes.
Here are some pics: