Hire someone to execute it.
Give them the vision, your goal and your plan / methodology for achieving it.
You’ll then have someone asking you to help, to get to the next step, they’ll start the momentum, as they’re responsible for it. You’ll also be more motivated to help as you’re paying!
It’s a little hack I use to maintain momentum and ensure the right ideas get done (beyond my capability).
It’s also great practice in communicating, planning & delegation… all great skills if your idea is to grow beyond you.