[lbotos]

My secret used to be http://www.typophile.com/ which had a font id forum and you'd get an answer from someone usually within a few hours. It was a really cool place.

They were down for a while so I don't know if that community re-formed or not.

[kswahl1]

https://www.reddit.com/r/identifythisfont works fairly well.

[cobalt]

whatTheFont also has a forum that you can automatically post to if the auto search doesn't find anything