Entrepreneur.com gives you the ten days needed to start a business.
Doesn't seem like enough time?
Go with your gut, go with your instinct and DO. It's all trial and error. Try and succeed, or try, make a mistake, learn a lesson and try again until you succeed. Stop waiting around and start doing.
Here's freelance writer David Port's 10 Days to Startup. http://www.entrepreneur.com/article/228659