Don't know if there is an easier way but just be sure that ur windows creates restore points (it is an automated feature and is on, unless u have disabled it) they can be very usefull.
And if u have 2 (or more) partitions put all of the really important files in the partition where there is no OS. This way if u need to reformat u can just delete the partion with the OS and the other partition will be left as it was, and all of ur important files will be there.
Edit: ^^or just put the to cd:s. U can't possible put them all on floppys, then u could like sell ur house and build a new one from those floppys.
I have all of my extremely important stuff saved to one 700mb cd, just all of my holiday pictures etc, they are something u can't get back if u lose them.