Step 1 - wrap a hair tie around the fifth fret of the guitar. It should lightly touch the strings so it mutes them a little bit.
Step 2 - if needed, adjust tightness with a pen. We used one with a rubber grip so it wouldn't slip around as much.
Step 3 - thread a chopstick (over/under) through all six strings of the guitar at the theoretical 24th fret. Start over the low E string as illustrated.
2) Playing areas and percussion key
On strings, right side of chopstick:
Base of chopstick
Smack strings (anywhere right of threaded stick)
Smack strings (left of hair tie)
On pickguard (articulated w/ left hand)
Base of stick while holding down head of stick.