Top Ten Geek Business Myths - This was a fantastic article for those that have thought about starting a business. To summarize: Dedication, hard work, research, and planning are more important than anything else.
One part in particular that I will think about: Sometimes ideas are origional for a reason. :) It has already been overly explored and found not to be feasible, or it has been tried and just failed. It is more sensible to take an old idea that is done poorly and do it right, just be sure that the reason it is done wrong is for reasons in your favor