Rule Zero
Whenever you don't know what to do, just think: "What is the most entertaining thing that could happen right now?" and do that (as long as it doesn't really hurt a Player).
What to Do
Whenever the action has stopped, and the Players turn to you to find out what happens next, choose or randomly roll for one of the following:
- Ask someone to make a Roll
- Introduce a Complication / Reveal an Unwelcome Truth
- Offer an Opportunity with a Cost
- Put Someone on the Spot
- Have a Power or Place Do Something Important
- Move a Clock forward (or back!)
- Introduce a new Threat
- Cause Harm