The top picture is my paper stash box, previously these were in draws and difficult to flick through, also a lot of them were free with magazines and although nice were a bit thin. So I slapped on the glue and glued these papers down, not worrying particularly what went with what as these were a first layer. A few layers of paper strengthens the box as well as making it look nice, the thinner the paper the more layers you will need. When I had finished I picked some nice pictures and decorated the box with them.
The box below is for my paints, I covered it with a piece of wallpaper and lined it with card. I also made the base more even by "filling in" with waste card from the box in between the flaps and covering that with a piece of card from the box lid. I think this will strengthen the base.