If you're at the start of a career or in the early stages of a business, few things are more useful than the real histories of those who have gone before. It's just that there's a trick for extracting useful and actionable truth.
How about the times you failed on your way to the top and how those situations taught you to do it better? How about the times you said 'no' when you should have said 'yes' to a business deal or a decision of profit building potential?
If you don't get want you need, be prepared to walk away from the relationship when you sense that this partnership is not for you or for your highest good. Don't wait to ask for what you know you need and want.
Besides careful market analysis, be sure to put conscious thought into the life you want to build by starting a business. By addressing both, you'll vastly boost the chances of finding success on your own terms.