You want a whiteboard in your room, but you don't want that large, clunky whiteboard. You can use a wall decal! Whiteboard wall decals have all the benefits of a whiteboard and all the benefits of a wall decal with zero negatives!
Pillow room: don't spend money on couches or lounge chairs and buy a really nice movie screen. (This would be really fun for movie night, to just move all the living room furniture and bring out the pillows!