Folding bedding has to be 1 of the most annoying jobs around the house! The sheets never fold properly, the duvet never stays folded, pillow cases dissapear or fall through airing cupboard shelves etc.
A friend said to me that she puts each bedding set inside its pillowcase, this stops the problem of the above and having to hunt for bits when you change beds (especially if you have kids and its 3am after they've been sick, your trying to do it quietly and in the dark). This method means you can just grab a pack and off you go. They also sit neater on the shelves.
I have spent today doing this and re-folding all of my towels so they are in a neater pile as well. It doesn't help that my airing cupboard is really small and only has 2 shelves.