Quests as Campaign Structure

Let's say you want to start a new campaign. It's about, I dunno, kids in a monster hunter academy. 

To make sure it's about what you want, and to give yourself and players some direction and focus, set out 1-3 campaign/default quests. Like:

* graduate from monster hunter school

* make and maintain friendships

* find and maintain romance

Say, "these are the default quests. You never can lose them. As long as you're following a quest, you're playing the game right. This is what the game is about."

Say, "You can and should write down other quests for your character before and during play. When you're following those, you're also playing the game."

The objective of the game is to see what happens when you follow one or more of these quests, to see why you do what you do, and to see what comes of it. 

When you as the the GM or you as the player don't know what to do next, follow a quest, present obstacles for quests, ask why someone is or is not following a quest, challenge that, or wrote and follow a new quest. .