With regard to Jailbait's P.S. -- always, always, always, test your backups by doing a recover. This is especially important as you are getting started, but should be done periodically on production systems as well. Depending on what applications you are using to do backups, you may just need to check an index of the tape, pick some file you want to recover, and do that. But you should also confirm that you can pull back the whole thing. Use a test partition.
Backups are easy if you don't need to recover
. But, the whole point of doing backups is so that you can recover. Make sure that's true in your case. Be sure, not just that the tapes work, but that you are familiar with the steps and can do them quickly and easily when you are in a panic. For example, if your system is blown away, and you have to boot off a CD and recover from tape, can you do that?