I tend to be a bit lasy regarding data backup, a problem which recently bit me when I accidently deleted some API documents I have been developing. Ironically I was in the process of starting to put them into cvs for both versioning and backup. Part of the reason I haven't been doing this regularly is that I tend to move and rename files and directories as I restructure things. Anyone who has used cvs knows that it does not handle that at all. I've been following a cvs replacemnt called subversion for a while and it does handle those situations. I'm not currently using though since it has not reached v1 yet and they are planning some changes to the repository. Once it hits v1 I'll probably switch over to it.