How do you decide what to grind next?

Everyone has their different goals and ways that they engage with the game, so I've been wondering about how people decide what they are going to do next.

Are you focusing on leveling for quests, or maybe going for base 50s/100s/200s? Do you focus on total level, episode level or maybe even individual profession levels? Perhaps you just do whatever you want to at any time, jumping between professions with no reason. Whatever it is, I would like to hear about it! :)