a composite list of the best stims of all time:
running warm water under fingernails
"finger crickets" rubbing fingertips fast together in a snapping motion, using all fingers (helps me think quickly and task switch, VERY EFFECTIVE)
dipping fingertips/palms in water
creasing paper against fingertips/palms
shaking wrists up and down
"lightbulb-ing" shaking wrists side to side (also helps with task switching)
opening hands wide and squeezing tight
cracking both wrists with open fingers
punching pillows/blankets
popping and cracking ankle bones
"floppy feet" sitting on chair, loosening ankles, and wobbling feet in the air without ankle support
bumping ankles against chairs/tables
lifting leg up in bed and throwing it back down on the bed
two pairs of socks before shoes
straightening posture and taking deep breaths
expanding muscles in back while taking a breath and holding it before releasing
cracking neck several times in a row
"gremlin face" hard brows, pout, wrinkled nose
tapping, pulling, poking lips
"sharky mouth" no lips all teeth all fury
mimicking, copying, repeating music and people for fun/accuracy
repeating phrases and words until satisfied with how the word FEELS
onomatopoeias, making sounds that aren't words and repeating them
saying nice things to people/animals (this is my favorite its almost an emotional stim, being randomly kind as a reflex)
repeating same songs over and over
noise cancelling headphones
jumping up and down (esp if nonverbal)
spinning in spinny chairs