My rule has been to just pad "do" appropriately. Almost everything else works out well with a 4-space tab. Also, don't ever use only one-or-two spaces for ind

My rule has been to just pad "do" appropriately. Almost everything else works out well with a 4-space tab. Also, don't ever use only one-or-two spaces for indentation, and if you're finding you have a long expression with so much indentation and unindentation that it gets confusing I usually find I'm doing something confusing and should simplify it anyway. For example: let x = y in do something something with ( lots . of . args ) something else Is not that hard to read for me, and actually looks quite nice. And if you're getting those terribly long-expressions, break them up. They can always be broken out in a let expression to be simpler, and with let the precedence is obvious. map (alpha . bravo) . filter charlie <$> xray <|> yankee >> zulu might be better written as let f1 = map (alpha . bravo) . filter charlee <$> xray f2 = yankee result = f1 <|> f2 in result >> zulu Haskell has the ability to write great one-liners, just like Perl, but it takes discipline not to use them. Of course naming your variables descriptively helps a lot too. Examples with single-variable names are probably not the best.