Almost the Same Except...
I have all of the things that previous posters have said. Campaign notes, lists of names, maps, etc,. etc., etc. The only thing that I have that is different (and I may be branded a heretic for doing so) are the source books that I buy (L&L: Character Primer, Toolbox & Magic by AEG) are ripped apart (!) and placed in plastic sheets for easy viewing and use. I can sort them as I want; taking only the ones that I need or mixing and matching them with other source books. I get a lot more use out of them this way.
I have all of the things that previous posters have said. Campaign notes, lists of names, maps, etc,. etc., etc. The only thing that I have that is different (and I may be branded a heretic for doing so) are the source books that I buy (L&L: Character Primer, Toolbox & Magic by AEG) are ripped apart (!) and placed in plastic sheets for easy viewing and use. I can sort them as I want; taking only the ones that I need or mixing and matching them with other source books. I get a lot more use out of them this way.