Your thinking is exactly backwards! Revision control systems are to help you and to save you arse when you do something dumb (and believe me, we all do dumb things). At the very least set up a git (or Mercurial) repository for each project you are working on right now. You don't need to share the repo now, or ever, but you get no benefit at all from it at the end of the project!

You may find Mercurial easier to get your head around than git, especially if you can use TortoiseHg (Wikipedia article). Modern systems like git and Mercurial take a snapshot of the current state of your project and deal with your entire project as an entity. CVS was a file at a time system and made a lot of stuff hard to do and difficult to understand.