haha a good back up method.....that would depend first on your budget Roosta
for affordability a RAID 1 array is not too expensive and setting up a few drives to mirror each other - is hard to beat for data redundancy
other steps people take besides mirroring is physical protection such as fire proof cases, and leaving it in external locations like Rick mentioned.
On top of my RAID 1 set up, I swear by my Solid State Drives - using them over the last 2 years in hazardous environments around the world and with the macbook pro getting dropped, used upside down or sideways, enduring a lot of environmental and physical factors - it has never failed me, a normal HDD would have been mechanically damaged the way I use it to do work.
So really, backing up/data redundancy is quite a personalized thing, there is no one absolute best method to do it as everyone has preferences and budget to work around. But backing up means there always has to have at least 2 of the same item at any given time, and for me these days 3 is the minimum