This was like the other night for me, when I went out to the trash. I didn't have to, it wasn't smelly trash and could've waited, but decided to do anyways. And found two 24"x about 6' pieces of 1/2" MDF, almost pristine.
Funny, because I'm in the middle of a project, and I was thinking exactly of getting a sheet of 1/2. Of course, I blew some of it on mistakes, but still.