How does one become an "Advanced Emacs User"?

I say this as I've been using Emacs pretty much every day for about 2-3 years, yet I can't help but feel I've only ventured a couple of miles into the journey.

I use Emacs not just for coding, but organising and note taking, file management, shell, git (just beginning to), irc, sometimes for browsing and occasionally twittering. I know (and love) registers, macros, jumping around with "the mark". However I feel as thought I have reached the so called "Plateau Effect" where I'm not advancing any further.

There are a bunch of good blogs out there about Emacs which I read occasionally as well as flicking through the wiki

* http://emacsblog.org/

* http://www.masteringemacs.org/

* http://emacs-fu.blogspot.com/

* http://www.emacswiki.org/

But, I still feel as though I am no where near what can be called an "advanced user". I feel as though there is still so much more Emacs has to offer, but I just can't find it.

I guess my question is: where do I go from here? How does one become truly advanced?

Sorry for hijacking this thread, and thanks in advance for any pointers.

P.S. FWIW my emacs.d is on github: https://github.com/ibrow/.emacs.d

Edit: formatting