Fold your piece of scrap paper into a small rectangle (the smaller and fatter the better) and slide it up between the two chopsticks, just under the rubber band. This will force the two chopsticks apart, thus creating a "spring" effect.
Step 3.Hold the chopsticks as you normally would (see the photo for a better idea) and press them together to hold food. Voila`! See? That was painless. (Unless you popped yourself with the rubber band. Ouch.)
Hope this helps! Have fun.