Take a sip every time Robin makes up a word, two if its used by someone other than Robin.
Take a drink every time someone references a different DC universe.
Take a drink every time Kid Flash hits on Miss Martian, two if Artemis hits him right afterwards.
Take a drink every time Robin chuckles / lets out his weird giggle-laugh.
Take a drink every time Robin does something sneaky / ninja (like disappearing on everyone.)
Take a drink every time some one in the team says their catch phrase.
Take a drink every time you hear "Hello Megan!"
Take a drink every time Superboy angsts about something.
Take a drink every time someone accuses another character of being the mole.
Refill the glass every time Aqualad uses a contraction
At the end of the episodes, drink twice whenever it's revealed that what the team did that episode didn't affect the Light's timetable or plans at all. Drink three times if what the team did actually furthered the Light's goals. Works in Season 2 as well (at least until "Summit").
Season 2 edition
Take a drink every time Miss Martian uses her abilities to wipe someone's mind, two if it's in front of witnesses who ignore it.
Take a drink every time Lagoon Boy uses a fish pun.
Take a drink every time people look at Blue Beetle weird for talking to his suit.
Take an extra shot if someone thinks he's crazy.
Take a drink every time Beast Boy says "noted."
Take a drink every time it turns out a character from season one died during the Time Skip
Take a drink every time it's shockingly revealed someone is pregnant or had a child.
Take a drink every time a character goes evil.
Take two if it turns out that they are a mole.
Take a drink every time a former hero comes out of retirement.
Take a drink every time someone makes a "flash" pun.
Take a drink every time Lagoon Boy complains about the mission he is assigned.
Take a drink every time a member of the Reach says the word "meat".
Only do this though if you are prepared to have your liver or other organs removed from them being ruined by alcohol overdose.
Drink for every villain that ended the show a Karma Houdini, take two for every plot that went unresolved.
Drink the pain away every time CN pulls a long and unexpected hiatus on the show.
Note: Only due so if you are insured for liver failure.
Now the show has been cancelled, down the bottle, regardless of drink.