You need to have three roles in a startup:
– Businessman
He/she should be all about money – make sure that there is enough money, track cashflow, kick everybody asses to bring in the revenue.
– Visionary
This person should think strategically – where do we want to be, what problem do we want to solve, how could the company be the best in what it’s doing.
– Builder
This person is all about tactic – choose a next step and just do it.
You don’t have to have three actual persons. One person can wear several hats, but without a doubt founders should cover all three roles between them.