Circle of competence vs comfort zone
Years ago, when I was young, I asked myself, "Where should I devote my limited time to achieve the most success?".
After many years of trying different things, planning, practicing, and learning from mistakes, I've come to one conclusion:
I'm not young anymore.
Along the way, I also learned the importance of knowing what I'm good at, focusing on it, and constantly improving. People say to get out of your comfort zone, but I've never felt like I've had one. ;-)