Use golf tees to put balloons in the ground lining the walkway to your party.
Glowing Balloons! What A Great Night Party Idea! Take a glow stick or glow necklace and insert it inside the balloon before blowing it up.
Hanging balloons, put a marble inside before you blow it up. Cheaper than paper lanterns!
Don't forget to use unconventional balloons - like these paper balloons you can use to decorate your food.
DIY Fringe Balloons
DIY Balloon Party Invitations - you could do this with a CARES event flyer - you could use a plain balloon, it doesn't have to be custom printed. It will be sure to catch your residents' attention.
Create giant snowflakes for a "winter wonderland" theme.
Another great example of using balloons as table centerpieces. It only takes a few per centerpiece and they really fill a room - especially if your room has tall ceilings.