Make sure you use latex free balloons in case residents are allergic! Surprise your residents by filling in balloons with treats and leaving them at their doors while they're asleep! Great as stress relievers during finals.
Free paint chips from Walmart + good handwriting = location markers for your residents! Door Decs, Resident Advisor, Resident Assistant, ResLife, Residence Life I like this idea better than mine. I might do this next semester.