Backing up your Apple device is pretty simple to do, and can save you a lot of agony if your device crashes, is broken, or is lost. I recommend doing it on a fairly regular basis (once a month at the least) for a couple of reasons:
1) It will minimize the maximum amount of personal media that will be permanently lost in any scenario
2) Any media that you purchased on the device will be backed up to your computer, and can be synced to a replacement device
3) It will keep your iOS current and ensure maximum compatibility with apps
4) It will back up any important business or personal contacts. Let's be honest, who really knows more than a handful of phone numbers by heart anymore?
The user interface in backing up your device can be a little tricky sometimes, but is well worth the half-hour or so it takes to prevent permanent loss.
I use a special program that reads the device like a USB flash drive, and can manually back up everything on your device without the hassle of doing it through iTunes.
I do offer iPod/iPhone/iPad backup and routine maintenance including iOS upgrades, so don't hesitate to ask if you have any questions!
Mike's Tech Service