My 'perfect' process , almost sure PRs if i can make all those :
Previous day lunch : tons of carbs
Previous day noon :
-dynamic warmup 10'
-tempo runs @ ~60% max speed , something like 3x5
-optionaly some submax jumps , like 1x3 SVJ - 1x3 dropsteps.
Previous day dinner : some more carbs , not tons though.
Dunk day , dunking 4-5 hours after waking up:
Breakfast = whatever makes you shit like crazy , for me its 1lt of cold milk.
( From here and below is what you really asked but its worth trying the previous things too ) :
1hr before dunks : caffeine , ~300mg ( that would be ~3 very full teaspoons of instant coffee )
30 mins before dunks : 1 redbull.
Dunks:
-10' mins dynamic warmup
-Some submax pogos , sth like 2x5
Warmup jumps:
1x3 relaxed full runup RVJs , low effort
1x3 dropsteps , mid effort
1x3 1 or 2 steps lead in jumps , ME
Those go like jump , walk to half court , walk back , jump , no 'sets' , like ~10 jumps in that fashion.
3 mins rest
ME Jumps/dunks , sets of 3 or 4 , 30-45 seconds between jumps , 3-4 mins between sets ,
Stop at dropoff over 1'' , if no dropoff there stop at ~30 total ME jumps
Many people recommend 1 set of depth jumps before the ME jumps for stim. It would go like warmup jumps , 3 mins rest , 1x5 ~20'' depth jumps , 5 mins rest , ME jumps. I tried it 3 times and didn't work but its a very common stim trick.
Hope it helps