The Best Way To Back Up, avoiding confusing files Options

[mellotron]

what is the best way to back up if you are using a cd burner to do it? right now, i end up backing up and my files become confusing. i will start a session in logic or reason and record basic tracks. then, i back those up. the next time i get a chance to record more, i do so and then back up the new tracks to the same cd. i also backup the new document file that is created as result of adding new things to the session. after a while, things become confusing because i have multiple files that all go back to the same session. it becomes difficult to remember what files i want to use and which ones i decided not to keep, or redo, or whatever else i decided to do with the recordings. does anyone have a routine that eliminates some of the confusion of backing up to cd-r's?