Don't let the company get distracted or excited about other things. A common mistake is that companies get excited by their own PR.
The track record for founders that don't already know each other is really bad.
Most good founders that I know at any given time have a set of small overarching goals for the company that everybody in the company knows.
Experience matters for some roles and not others.
You'll get more support on a hard, important, project than a derivative one.
What being a founder means, is signing up for this years long grind on execution - and you can't outsource this.