Backing up question...

[SaraAmarie]

With all the organization talk, I have to ask about backing up! I have the hardest time with this! I haven't backed up in a loooooong time. (Which is BAD I know!) I have some stuff backed up but then once I get new stuff, it is all mixed in with the backed up stuff so when I go to back up again I don't know what has been backed up already so I put off backing anything else up. My photos aren't a big deal because I keep them organized by month. Sooo how do you deal with this? Do you just back everything up again and get rid of other discs? Do you keep everything new separate until you back it up? Or....