Harry Potter meets the myth. Katniss Everdeen fights like a myth. The use of a familiar myth helps make the magic more plausible because you already have practice in imagining these fantastic gods and creatures.
Sometimes I'll act as if I'm another character, talking to the character that I can't name. I act as if I'm telling at them, and suddenly I be like, "Why would you do that, [insert random name i come up with on the spot] .