Instructables
After making a really difficult and almost completely useless chopstick creation http://www.instructables.com/id/Mad-Chopstick-Burr/
which requires a huge amount of bits and bobs - so here is a simple and easy trick that you can make in any restaurant / takeaway that gives free chopsticks in a little paper sleeve.

Many beginners struggle to use chopsticks - this can be more easy if there is a hinge/spacer to keep the chopsticks in the correct alignment and separation.  These can be made with the paper sleeve that the chopsticks come wrapped in - my Instructable  uses a simple piece of paper because I don't have any freebie chopsticks
 
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Step 2: Hinge points

Next you need to flatten and press the v-shape - do this roughly around the middle, not important to be exact.  This is, an origami thing - but I don't know what the terms is.  I am not sure how to explain - but the pictures makes it obvious.

First you make a diagonal fold so that the two section are at right angle to each other
Unfold the diagonal fold - whilst holding the v-closed  flatten out the other side.
The diagonal folds that you made will allow you to have one side closed and the other open.