--Someone has a bad feeling about this.
--It is Luke´s destiny.
--A TIE fighter explodes for no reason.
--Obi-Wan Kenobi materializes for a guest apperance.
--Luke discovers a long-lost relative.
--Han brags about the Millenium Falcon.
--Anybody insults the Millenium Falcon.
--Tarkin brags about the Death Star.
--Leia insults somebody.
--Luke whines.
--The Emperor cackles evilly.
--Yoda uses bad grammar.
--Yoda talks like a fortune cookie.
--An entire planet is described as having one climate.
--It´s their only hope.
--R2-D2 gets thrashed.
--C-3PO loses a body part. Take two drinks if he is completely dismembered.
--Luke fights monsters or savages.
--Boba Fett talks.
--A gigantic technological marvel explodes in a single blast.
--There is a tremor in the Force.
--Luke does some nifty acrobatic flip.
--An old Jedi starts to ramble about the Force. (Vader counts.)
--An Ewok dies, and the camera lingers longer than it did when the Death Star killed billions of people. (Fourteen seconds. Count 'em)
--Somebody´s hand gets cut off.
--The Emperor has foreseen something.
--Luke teeters on the brink of a chasm.
--Stormtrooper armor proves useless.
--C-3PO informs us of just how many forms of communication he´s familiar with.
--It´s not someone´s fault.
--One or more heroes are almost eaten by a Thing.
--Leia wears an outfit that covers everything except her face and hands.
--Twice if it covers her neck.
--Theee times if she´s almost totally nude.
--A Jedi is much more powerful than he looks.
--A woman other than Leia is on screen.
--Twice if she´s a Rebel.
--The whole container of whatever you´re drinking if she´s an Imperial (don´t worry, it´ll never happen)
--Something doesn´t work on the Falcon.
--Twice if it´s the hyperdrive.
--Someone exclaims "No!"
--Luke is upside-down.
--Someone does something apparently suicidal that turns out to be a good idea.
--Twice if it´s not Han.
--Someone wears the same outfit in all three movies, it counts if they change at the end.
--Luke and Lando are in the same place at the same time.
--Twice if they speak to each other.
--Vader runs into one of his kids and doesn´t recognize them.
--Someone is mind-controlled using the Force.
--Luke´s parentage is Foreshadowed.
--People kiss.
--A Rebel pilot is of a race other than white.
--Twice if they´re non human. (co-pilots count)
--A good guy wears white or a bad guy wears black.
--Twice if a bad guy wears white and a good guy wears black. (for uniforms- only the first person on screen counts)
--Three times if someone hovering in between wears gray.
--Every time you find yourself talking to the people on screen.
--Luke refuses to take someone´s advice.
--An elaborately made up alien has no lines.
--Someone or something tries to get money from Han.