Alternately, have a second drive attached and run 'second copy 2000' (shareware, costs some huge sum, a shade under £20 I think) which will record any files and folders you pick, and copy them at your chosen intervals, on days of your choice, to a wide range of media including via network... I have a 2nd HDD in the case that gets a copy of all my important folders every 20 mins for example.
This is, of course, in addition to making 'restore points' every now and then, a full backup regularly (via another shareware package) and saving my program files and email info to CD... it sounds quite a lot, but takes 5 minutes.
Dave
(Of course, if the meteorite hits I'm snookered)