In terms of backups go for a professional approach.
Save all data to the NET or harddisk.
Make 2 backups on whatever medium will hold it - floppy, CD etc.
Keep one copy at work, or somewhere other than where the PC is. This saves you from cruel events like fire or theft.
Only thing of mine my mom threw away was my Nazi Punks Fuck Off pin, which she never admitted to it, but I know I know what happened.
To add to don’t ask’s backup strategy. Get a couple of free web based email accounts and email yourself a copy of your file(s).
50MB seems to be a common limit, but nothing prevents you from registering more than once if you are even moderately sneaky.