I had an old roomate show me how it works, he had a sweet truing stand and we totes had a collection of old steel rims for me to practice on.

Everyone I know hates doing it, except for me, I actually kind of like doing it. k, fine, I find it straight up fun. But one thing he did made it super easy to understand: He made little labels with a clockwise arrow and a counter clockwise arrow saying "tighter" and "looser" and stuck them right there where you couldn't miss 'em while workin on it. It made everything make sense really quickly. None of those "wait....ummmm...uhhh..." moments!