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Beemind “Days I did NOT crack my knuckles” (It’ll be either 1 or 0.) & start with a really shallow yellow brick road, then ramp it up as you get better. You still need to enter data, but only once a day. If you’re not sure what the result was for that day it’s a 0.
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Put a sharp ring or a rubber band with a thumbtack through it around your knuckles so you notice when you’re doing it.
(Just some ideas, I have no personal experience with a knuckle cracking habit.)