What if I don't have an idea?
edw519: Find a customer.The current changes in economic conditions may swing the pendulum back in favor of a subscription (vs. advertising) model for web apps.There are 7 million small businesses in the United States.  Every one of them needs something.  They are everywhere.Start networking.  Let everyone know what you do.  Before you know it, they'll be coming out of the woodwork saying things like, "We sure could use <xyz>.  Do you know of any way we could get it?"If you can't find a promising idea and a way to get started on it in 30 days, then maybe you shouldn't be an entrepreneur.Good luck.