hahahaha. oh man. i lol'd.
uh but for real.
extra blankets and such.
couch and extra chairs.
acquire used furniture. its cheap and you'll prolly end up throwing it out or giving it away when you move again.
hand towels.. for the kitchen and bathroom. it sucks not having anything to dry your hands with.
pots pans etc.
cleaning supplies.. those green scrubby things, dish soap, toiletry cleaning stuff.  vaccum. broom/dust pan.
light bulbs, tools, extension chords, that kind of stuff
laundry detergent!
always have extra food for if you have guests over. it sucks not being able to offer them anything.
patio furniture, a grill, grilling supplies.
pick up some art for your walls, and do it tastefully.
thats all i can think of for now