I am bad with keeping older versions of some of my work, and as a result I will sometimes make a stupid mistake, save it, and have no previous version to go to. Does anyone have a good backup system or use a tool that creates backups/version history of files? I can't believe I have already waited this long to find a solution...
CVS and Subversion are source control servers: you essentially 'check out' a file when you're about to change it then 'check in' that file after making the change. The source control server will basically keep track of the changes between each version allowing you to 'roll back' to a previous version. You could install one or the other (I'd recommend Subversion) on your computer then just do that...