Chop sticks tricks are string tricks, that are done between the fingers of one hand. There are quite a number of mounts possible. Chop sticks mounts are often transitioned to standard two-handed mounts, so there are few tricks that can be classified as pure chop sticks tricks. Originally the Thumb Mount was intended as a picture trick (see infobox). However, a whole set of string tricks utilizing one handed mounts were developed afterwards.
This is the basic Chop Sticks mount.
Do a trapeze.
Put your freehand thumb onto the string.
Bounce the yo-yo up over your thumb and land it on the segment between thumb and index finger. Alternatively, you can also land on both strings.
To dismount, lengthen the mount by giving it string with your throw hand. Put your throw hand finger into the string (third picture) and pop the yo-yo out of the loop. Now swing it into a normal Double or Nothing and dismount.