Write down ten secrets and clues that the characters might discover in the next game session. Secrets and clues are the connective tissue of a campaign. After the start of the adventure, they’re the second most important thing to prepare. Each secret or clue reveals a piece of the story or the history of the world and its inhabitants. Keep secrets and clues abstract from how they might be revealed. Improvise the discovery of secrets during the game. Throw away secrets that aren’t revealed during a session. Write a fresh list each time.