Startup founders have limitless ambition, but need to get realistic about their need to focus. - Startup key to success: become world class at something a large number of people value. - Big visions for success are contagious but misguided if there is not enough focus. - The range of products a successful company should offer should be focused and limited. Don’t start out with multiple products or multiple target audiences. - Success is contingent on focus & prioritization. Identify your biggest sole opportunity, and then dedicate all resources towards that. - To become world class at what you do, dream big but focus small.