The iPad backup will happen automatically when you sync your iPad with your computer. Some people don’t sync their iPad with a computer, in which case the backups are not being made. This may be even more of a problem when with iOS 5 it will not be necessary to connect the iPad with another computer. Although with iOS 5 there will also be iCloud and this may take care of some of the backing up and synchronisation.
So here is an article that has good information about backing up generally, as well as backing up your iPad specifically. How to create a backup for the iPad, the process of iPad backups, how to do an iPad restore from backup and be fully organised with your backup strategy.
Using the 3 2 1 strategy with Time Machine and SuperDuper along with Dropbox to ensure that you will never have an ‘oh my goodness me’ moment. Or words to that effect!
How do you organise backups for your iPad? Is your strategy any different from the one I outline in this article? Looking forward to hearing your feedback on this.