I liked the article. Very objective and helpful. I think that estimating the impact of your solution to a problem could guide you to avoid misfires. However, I believe the experience you get from anything (success or failure) will lead you to something greater. It's a trial and error for me. Also, I think knowing when to let go of a project is an essential trait. My opinion though is that the most valuable thing we have is energy. So my comment is "pick your battles, preserve energy for a big one but be sure about the impact first". Doing some research maybe at first could help. Thank you for sharing your experience.