Among other backup methods you should seriously consider is online data backup. The online backup method has become fairly widespread among end-users and provides the desirable level of security for most of them. It is worthwhile mentioning that most online data backup services provide free space for unlimited usage and it is very likely that you can try and squeeze your most valuable data within these limits. Make sure to set up your backup utility for auto backup at the preferable schedule to have your files backed up on a regular basis.
There are of course also other methods of backup you may run into, but these are the most likely and useful for personal usage backup methods.