Can anyone tell me more about how I can use subversion in my web development?

Any recommendations as to what software to use, or how to best set it up and use it? I’m running OS X, but recommendations for other operating systems are welcome.

Basically, I want to be able to revert to any previous version of a file easily without using an external drive or having to follow a complicated routine.

I have zero experience with subversion clients. I already have Apache, PHP and MySQL installed on my system, if that has anything to do with anything.

Thanks!