Also don't miss (in no particular order):

Tutorials

http://github.com/relevance/labrepl (gives a kick in terms of functional thinking, use of higher order functions etc)

http://www.try-clojure.org/

http://4clojure.com/

https://github.com/functional-koans/clojure-koans

Documentation

http://clojuredocs.org/

http://en.wikibooks.org/wiki/Clojure_Programming

http://www.clojureatlas.com/ (Finding functions by browsing the relations of APIs and API-functions is just to nice)

http://cemerick.com/2011/07/05/flowchart-for-choosing-the-ri...

http://clojure.org/cheatsheet

http://www.clojure-toolbox.com/ (not up-to-date)

I'm sure i missed something, but those links can really be helpful.