The Top Idea in Your Mind
I think most people have one top idea in their mind at any given time. That’s the idea their thoughts will drift toward when they’re allowed to drift freely. And this idea will thus tend to get all the benefit of that type of thinking, while others are starved of it. Which means it’s a disaster to let the wrong idea become the top one in your mind.
What made this clear to me was having an idea I didn’t want as the top one in my mind for two long stretches.