first thing is proper planning. Make the right decisions for the right reasons. i.e. you need to do a lot of research and level-headed thinking.
Avoid addictive and medicating rush causing impulsive and improper decisions.
Make sure you have several options before selecting the business to go into.
Are your family, close friends, banker, lawyer, accountant and coach/mentor supportive of this venture?
partners, customers, vendors, suppliers and employees. Are these people that you trust?