However probably the one that I have enjoyed the most is the concept of ‘magic time’. I have consciously changed my schedule so that I now wake up generally between 4 - 430 a.m. every day.

It comes from the fact, in western (European) cultures and mythology primarily, that a silver bullet is the one thing needed to kill supernatural creatures, mainly werewolves. From that it grew into a way of speaking about a simple solution to difficult or intractable problems. E.g. "I may have a silver bullet for this problem."