I'm doing the same. Have you read Life Nomadic? The guy who wrote it did exactly what you're aspiring to do and he seemed to do alright for himself.
I'm building up my programming skills and saving up 2 year's worth of money (as well as paying off any outstanding debts) before embarking on this grand adventure.
by the way of advices, I guess I can only say just keep a tight lid on your wallet; spend it only on necessities, like food, shelter, and bills.