Take a sip every time a character says "impossible" in reference to something that's happening right before their eyes.
Take a drink for every minute the protagonists spend staring in terrified awe of an overpowered villain without doing anything.
Take a drink any time an under-powered character lays a smack-down on the villain because the villain really pissed him off.
Take two shots if it makes the character power up to his next level.
Take two shots if it is Gohan
Take a drink any time a character powers up to a Super Form.
Two for a new one.
Take a shot each time a character begins beam spamming an enemy in futile.
Take two if, after the spam, the dust made from the spam disappears and the intended victim is left completely unharmed or simply has their outfit dirtied.
Take a drink for every full minute that a character screams and/or grunts without stopping.
Take a shot every time a human member of the group tries to actually do something and fails miserably.
Take two if they wipe blood from their mouths first.
Take a shot whenever a villain gets blasted in a powerful explosion(s), but then a minute later after the dust settles they are revealed to be perfectly fine.
Anytime Android 18 makes a sarcastic comment, drink.
Anytime Vegeta calls Bulma "woman," drink.
Anytime (kid) Goten and Trunks misbehave, drink.
Take a drink every time Hercule (Mr. Satan) makes an excuse to avoid revealing that he's not the strongest guy on the planet.
Take a shot every time someone cries out the name of his/her fallen comrade.
Take a shot every time Vegeta's pride makes him do something impractical.
Take a drink every time a character dramatically reveals that he wasn't using his full power.
Take a shot every time who characters get locked in a "who's ki is strongest" beam war.
Take a shot every time the eternal dragon is summoned
Take a drink at the beginning of every fight where one of the characters is fighting with his arms by his side or folded.