Just wanted to introduce you to a beta version of a tool i've been working on called What is My Comfort Zone? (http://www.whatismycomfortzone.com), basically, the tool is a 'comfort zone calculator' that measures and analyses your comfort zone. Those who follow The Musician's Guide blog know that it's something I rattle on about quite a lot for musicians as I think some of the biggest opportunities for musicians require getting out of your comfort zone.
Feel free to give the tool a shot
I run The Musician's Guide, a website that helps DIY musicians learn about the music business and get better deals on things like distribution, promotion, and recording.