Losing My Stuff

I really wish I had backed up the pictures that I had on our desktop before it died. I had put together a couple of cute picture slideshows to use as screen savers and DD really liked looking at them. I hate when there's a computer that goes down and I lose everything. We still have two towers in storage that we need to get stuff off of from when they crashed too! Such a pain...! I really need to learn to back up things.