You may be tempted once you've done your business model to immediately start working. Have you got a team? Are you going to manage the project by yourself?
It's crucial that you remain the leader but also that you don't do it all yourself. There will be more work in the future and you might not be available to pick it up, putting your all project at risk.
So as a founder, do not take up too much in order to have a clear mind to steer the project as needed. Stay in control and use Business Ideas regularly to assess your ideas.