Altered Pages had some sweet coffins and I grabbed a few. Anything creepy or macabre and I'm all over it. These fit the bill perfectly. I'm just starting the altering since I only received them yesterday. I started with some burgundy Lumiere paint on the outside and some gold Lumiere on the inside. One more coat of each and my coffin will be ready to embellish.
Now...how to add to it. I know Altered Pages has great skull beads that might look just right along the edge of the lid. There are also a lot of creepy Halloween collage sheets that would definitely add some scare to my coffin. Maybe put Edgar Allen Poe the inside of the coffin.
And in case you didn't see, Altered Pages has some great wood items for altering. Check them out here: http://www.alteredpages.com/shop/Wood.htm. Can't you picture those little hangers all decked out for Valentine's Day? I know I will be getting some of those and the wooden spools with my next order!