"Fear, I've come to believe, keeps more people from starting businesses than any other single factor. You hear about other obstacles--lack of money, inadequate support, bad advice--but they pale in comparison with the fear most people have that their new venture will fail."

-Norm Brodsky http://www.inc.com/magazine/19991001/13574.html

I was in your position two years ago but in my case I had a serious health problem. I was scared shitless. I didn't want to give up my job because I needed the health insurance. But my job was making my health worse. I quit and second guessed myself for a long time afterwards. But two years later I am fighting fit again. Thinking back, my only question is, why did I wait so long to do what was in my best interest? Most people who knew me thought I had the best job in the world. But I was miserable. For several years (!) I listened to them instead of myself and made my health even worse. Complete and utter irrationality combined with a lack of self-confidence. In the end I only did it because I had to, not because I am a shining example of courage. I really thought I was throwing everything away and yet I was so wrong. Let my stupidity be your guide. Oh, and the company went under after I quit. So much for throwing away my security. The question is really much simpler than you think.

If it's not too personal, would you mind telling us how the job made your health worse?