It can be any number of things. Maybe you finally want to grind out Exalted with Warsong Gulch. Maybe your raid group is in dire need of a good clean boss kill. Maybe you just want to head to Silithus and grind out that Guardian of Cenarius title. Whatever the reason, you have a goal, you have a plan, and you are not going to stop until you get enough.
But one thing remains: You have to keep yourself focused on your goal. That's when you put on your game face, and that's when you have those little rituals that keep you pumped up and motivated.