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If you truly want to master the language, Reg Braithwaite's stuff is incredible. I think Javascript Allongé is one of the best programming books I've read on any topic, and it's free online: http://leanpub.com/javascript-allonge.

Excellent resource, thank you very much for posting!

If only it wasn't full of hipster coffee analogies…

Crockford is largely how I learned too. He's a crank but I've found that to be a useful property when I was learning JS. (Or really, re-learning it as you say)

Check out the book Effective JavaScript[1], too.

[1] http://effectivejs.com/

Crockford's "Javascript: the Good Parts" is a very good book.