I have shelves on my wall and I jump onto them so that I can see the attic. Then you just drag what you want to keep up there. Also, in Decorate mode, you can use the arrows to move the screen up and place them that way.
*Moans Deeply* Its still possible, it made people think badly of me, if you dont remember, my old Username was CDOG... ...IF you really wanna know, it involves getting on an invisible Ledge and using something... Search "Attic Jump" in the forums to know the entire thing