Take up digital scrapbooking. My first version of this layout (very similar) totally disappeared from Photoshop. All the other files I had opened stayed just fine, but the layout just went kablooey. I didn't think it was that horrible but apparently PS felt differently.
Here's my afternoon waster in full living color:
I will probably do this again, despite the frustration of losing work, because my scrapbook desk is buried right now and I've been missing scrappping.