Drink:

Once when Sarah says "It's not fair."
Twice when someone else says it.
Once when Sarah says "It's a piece of cake."
Twice when someone else says it.
Every time Didymus yells "charge!"
Whenever Ludo calls the rocks.
Every time Jareth sings
Every time Jareth changes clothes
Every time Jareth uses a crystal
Every time Jareth mocks Sarah
Every time Jareth threatens to throw someone into the Bog
Twice if it's not Hoggle
Twice if Hoggle does anything to stand up to Jareth
Twice if Jareth isn't cruel.
Every time Jareth sings.
Twice if someone other than Jareth sings.
Every time someone misguides Sarah.
Every time Sarah says Toby's name.
Every time Sarah acts childish.
Twice each time she starts to mature.
Every time the labyrinth changes.