Making the jump:
Fire your Boss! The Successful Home Freelancer's Guide Starts with a questionnaire to see if you're ready, followed by tips for making it work if so.
10 Stupid Mistakes Made by the Newly Self-Employed A few more great tips for after make the jump.
Ready to Start your Own Business?
(It's worth noting that I jumped without any of this introspection. It's (ahem) also probably worth noting that I ran up $30K in credit card debt in the first 2 years before I turned the corner a split second before completely crashing and burning.)