Getting Started-Some background info

For years I have been reading simple living blogs and books, and dreaming about the day when I can retire (early) and live in tiny house or converted bus.  Well, you have to walk before you can run, and I am ready to take a tiny first step. I am gearing up for a year of doing without.  What can I do without?  How much can I save? It's an intriguing idea, and I will spend November and December planning and readying to drop the bottom out in 2011.