I used to just highlight the word 'Jehovah' and 'Jesus' as a teenager... that was about 50% of the answers correct.
I preferred to cover my bible and Watchtower in dribble, usually accumulated whilst attempting to sleep during meetings.
Eventually I learnt to sleep with my eyes open, could successfully look up Ecclesiastes 1:29 (or some such), and even raise my hand randomly and say 'Geehova, zzzzz, zzzz' if a mic broke my line of dribble whilst dreaming away contently.
Of course the biggest danger in sleep was the "electric violent head nod of sleep distress" (you guys know what I mean), which could be accompanied by a random outburst (or a sound similar to one acheived by poking a pig with a stick) - experts again learned to blurt out "Geesus, aymen, men, ahmen, <sigh>, zzzzz zzzzz zzz ".
Some of these techniques serve me well in my career today.