Musicians do it, so should we.
Snap, crackle, pop. It is important to properly maintain your tools regularly. Whether one writes with a pen(cil) or a keyboard, we must all take care of our hands. Some people think popping knuckles is bad for you, some are just uncomfortable doing it.
Do it anyway.
Chiropractors pop necks, backs, elbows, ankles, and all other joints, and you pay them for it. Writing for hours can be a big strain on the hands and fingers. Once my fingers got stuck in the pencil-grip position for several minutes after. It could happen to you.
Pop your knuckles
Stretch your fingers
Bend them behind the hand
Pull them gently out from your hand to extend them all the way from your wrist
Bend your wrists back
Bend your thumbs back
Extend your fingers in a wide stretch then bend them like claws, repeat that a lot.
Play with chinese medacine balls (they’re the little metal ones that jingle); this is for dexterity.
Put a rubber band around your fingers and thumb and move them in and out repeatedly to create and release tension in the band; this is for strength and stretching.
Massage your hands
Do the Mr. Miagi rub together for warming up.
Do these before/during/after long writing sessions and your hands and fingers with be happy and crampless.
Don’t let your hands get like this.
That is all.