Your bright idea may not be as great as you think: you’re too close to it. Sit with it. Poke holes into it. Let it earn your attention.
You didn’t give it time to rot. Initial excitement blinds you. You only see the potential, not the flaws.
But while you’re still excited, simplify it. Because almost certainly, it’s way too complex.
A good idea survives boredom. A bad one needs excitement to stay alive. And if it does survive? Well, now you have something worth building.
See also: Unfolding with Context, Self-anthropology