Today's tip was given by John

Jantsch at Duct Tape blog

Marketing.

Here are some questions you should consider to ensure that all the passion and money invested in your idea will return:

You can create a product or service that meets your needs?
There is already a well-established market for what you want to do?
There are strong competitors doing what you want to do?
You can stand out from the competition doing what you want to do?
You can use the internet to generate low cost contacts?
You can profit from 200 to 300% on your product / service?
You can sell your product so that the company can achieve scale?
There is no company that does something similar where you can work?
You can start as small business and grow?
You can have an optimistic view of your business here 3-5 years?