My friend in the room next door challenged me with this project. He needed some way to hang his backpack. Originally he wanted to use 3M adhesive hooks, but these didn't stick to the inside of his closet. The strength of this setup depends on which hanger you choose and how many rubber bands you use.
Step 1: Requirements
A. 10-15 rubberbands about 1.5 inch diameter
B. Somewhat heavy duty hanger
C. Hanger rail
Step 2: Construction
While a hanger could possibly be used normally, I find this method to be the most convenient because there is only one handle to worry about hooking.