If you have an iPhone as well, get the logten universal app. It works on both (pay once) and they will serve as a back-up to each other. If you only have an iPad then I think you can still manually back-up if you sync with iTunes, but the easiest option is using apple's iCloud (free up to 5gb). Switch it on -in iCloud settings- and it should auto back-up daily (when connected to wifi).
Last edited by XLNL; 15th Aug 2012 at 21:15.