Take a drink every time:
- Ted has a new Love Interest/Girl of the Week/conquest.
- Two if it's during Season 1 or Season 5.
- Ted has a girlfriend lasting more than 1 episode.
- Marshall and Lily are Sickeningly Sweethearts.
- Someone uses the word "awesome".
- Two if it's Barney.
- Someone makes a Star Wars reference.
- A Flash Back or Flash Forward is shown.
- Two if it's to Ted, Marshall and/or Lily in college.
- Take care with this one, seeing as technically every episode is a Flash Back, so really you have to drink for nine seasons.
- Challenge accepted!
- Ted's kids are shown.
- Two shots if it's not a Stock Footage.
- A clue about the Mother is given.
- Robin Sparkles is mentioned.
- Barney gets slapped or has a drink thrown at him.
- Two if it's by Marshall.
- A song is featured.
- Ho Yay or Les Yay occurs.
- Two if it's between Lily and Robin.
- When weed is substituted for sandwiches.
- Three when it's not.
- An episode features The Captain.
- Someone plays a Drinking Game.
- When Robin says "But, um...", join the crowd.
- Marriage and/or weddings are brought up.
- Ted declares a moment life changing
- People high five/fist bump.
- Two if someone asks for a high five but no one responds.
- Somebody drinks something alcoholic. (Keep a phone dialed to 911 on hand).
- One drink when Lily says "Youuuuuuu sonofabeetch!" Two if she says "Youuuuuuu sonofa-me" to her actual son.
- Barney says (or some kind of variation):
- "Suit up!"
- "True story."
- "Legen... wait for it... dary!"
- "Glad you asked."
- "Challenge accepted!"
- A pun based on the word "Bro".
- "What up!"
- There is a "telepathic conversation".
- Lily gives advice.
- Two if that advice isn't followed.
- There's a Tear Jerker.
- Two if it's from Season 6 onwards.
- Another if it's during Season 7.
- The whole bottle for The Finale.
- Either original or the alternate ending counts.