Starting a business

This question is asked representing all of those ambicious kids that whant to start their lifes as business man/women.
All of the kids with an entrepreur mind that think they were born to be a succesfull bussines man/women may whant a little help on their start of this dream to come true.
So here is my first question:
Whats the first and most important thing that needs to be consider to start a business?

1. An idea: 

• Good idea for a business.
• Try to create the business with a partner. Two or more minds work better than one
• When you have the idea be sure you are confident with it and that it will be succesfull in the future. Your personal feelings put in a business helps.
• Every other idea putted on the project needs to be written at ANY TIME
• Ask older people with more experience on the subject to help you and discuss the subject until the things get clearer.
• After you have done all or most of the things ive mentioned writte a simple document of what the business will be about, with the general things that will be considered wille running the business.

I will be bloggin other advices and steps to start and run a business.

Motivation phrase:

"The best way to predict your future is to create it."

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Matías Mingo