Tor also acts as a proxy, so if you or someone you know is living in a country where Internet traffic is restricted, using Tor allows them to bypass web censorship. With browser plugins to make it easy to use, anyone with only a small amount of technical know-how can get unfiltered web access whether their government or employer likes it or not.
You can download Tor, and quickly benefit from its security benefits, if you're concerned about staying anonymous online. If you want to help others bypass censorship, you must run in relay mode. It's easy to setup, and will only take you a few minutes. It will even do its best to talk to your router to configure services so that you don't have to.
By simply leaving a Tor relay node running on one computer on your network, you can help guarantee anonymous, unfiltered access to the Internet for anyone in the world. No muss, no fuss.
If someone lives in a country with web censorship, they may have a hard time getting access to the Tor install files. So, if you have some web space, consider mirroring the install files. Pass the link discreetly to those that might be interested in such things. I'm setting up my own mirror right now.