When you think that one of your ideas is a billion dollar one, remember the S-logo. Your idea is probably not as unique as you think it is. After a game-chasing [sic] insight strikes you, focus on how well you can execute upon that idea instead.~ Chris Bailey from, https://alifeofproductivity.com/your-ideas-arent-that-unique/
I agree and I will go farther: An idea alone is worthless. It becomes increasingly valuable only if one thinks through the second-order, (and third and so on,) effects. Only when one thinks about how the idea connects to everything else one knows. Only when the idea has been connected to, and tested against, reality.
A good idea has some real, objective—others see the effect too and their observations agree—effect in the world. That part is trivially easy; “I think moving this chair is a good idea!” and then move the chair. But to be a good idea, it must also create value which can be traded, (in the most general sense,) with others. Moving the chair out of someone’s way is a good idea. Moving it to make them trip is not.
I can easily become trapped in my own thoughts. So many ideas! So many possibilities! But instead of ruminating in a whirlwind of worthless ideas, if I pick one, think it through, and then stand up to go make it happen— Magic. Efficacy for the win.