"Yeah, here come the Rooster!"
Rooster, Alice in Chains
Invoke: To take the fight to your opponent; to move toward danger, rather than fleeing; to display strength and courage against long odds
Compel: To cause you to tackle opposition head on, rather than using stealth or intrigue

"One tin soldier rides away."
One Tin Soldier (The Legend of Billy Jack), Coven
Invoke: For anything that helps you remain standing, or at least functional, after a conflict
Compel: To cause you to leave after a conflict, without explanation or reaping the reward for your efforts

And finally, for a song just chocked full o' Dresdenverse-style ideas, look up the lyrics to Bat Out of Hell by Meatloaf.