Do you have many 'functional' piles in your home? They deserve the name 'functional'.
Here is my book pile. A pretty light hearted collection at the moment - except for the book about Aspergers (Mst 11 has Aspergers). Usually there are educational or membership/work related journals/magazines.
I have a pile on my desk - things I need to attend to or people chase up (again).
A pile on the kitchen bench - you know things to return or children to put away (edit:that was to read 'things for the children to put away').
and a pile on my craft table - items to do/make in order so I stop procrastinating!