Haskell is

the white man's burden of programming languages.

>>76,78
IO monad:
main = do
  mapM_ putStrLn ["hey","guise"]

STM monad:
withdraw :: Account -> Int -> STM ()
withdraw acc amount
  = do { bal <- readTVar acc
       ; writeTVar acc (bal - amount) }

Parser (Parsec) monad:
parens  :: Parser ()
parens  = do{ char '('
            ; parens
            ; char ')'
            ; parens
            }
        <|> return ()

Do you see a pattern forming here? Thank god we abstracted that shit, yo!