How To Bulletproof Your Wrists For Any Calisthenics Skills?

A wrist is a complex and peculiar part of the body. Work it too much, and it starts malfunctioning and hurting. Work it too little, and the same thing happens—pain, though for different reasons.
Now, this would have been easier to ignore or downplay were it not for one major caveat: your wrists are essential for so many things.