Reminds me of what Steve Jobs said: "Focus is about saying no". That resonates with me in that very often when I'm doing a task I was passionate on and now I'm not so passionate on it because there are 100 other things Id rather be doing. To have the stamina to persist by saying no to the other things is what gives people a huge advantage. "No, I won't stop running" or "No, I won't switch projects cause this shiny object is more interesting". I think having the stamina to keep persisting is a huge advantage, but it often comes at you saying no to all the other things you'd also like to do.
I'm pretty good at filtering out distractions that come to me as they're assumed to be a distraction unless I see otherwise. I have more trouble filtering out ideas that I have myself as I often feel they could be relevant even though they haven't passed similar vetting. What resonated with me was Warren Buffet's "Two List Strategy" aka 5/25 rule.
