The final component of any good backup program is automation. Mac
OS X provides several command-line scheduling tools, including the
venerable cron and launchd, introduced in Mac OS X 10.4. If
you've gotten this far, I'm going to assume you either know or can
figure out how to use the scheduling tool of your choice.
However, I should point out that you can download easy-to-use
graphical interfaces to both cron
and launchd, which will make the
job easier if you're not accustomed to command-line scheduling:
Cronnix (http://www.abstracture.de/projects-en/cronnix) is a free, open-source
croninterfaceLingon (http://lingon.sourceforge.net) serves the same purpose for
launchd. If you chooselaunchd, I recommend reading the article I wrote for Macworld, "Launch Your Mac," which explains its use (http://www.macworld.com/article/48705/2006/01/februarygeekfactor.html).