In my quest to be great at all things, I become mediocre in them. I have to choose…just like I can’t reach my peak strength while also having the best endurance, I must prioritize what is most important to me. Do I want to be a powerlifter, a bodybuilder, or a marathoner? If I choose to be all three that’s fine. It may be the best overall for my health (being well-rounded), but I will limit my success in all of them by choosing to do all three simultaneously. If I want to compete to be the best in any of them, I must focus on only one.
One way to try to circumvent choosing only one is to have overlap in the things in which I want to be great. Figure out what each thing has in common…do they have similar training schedules so I’m not spending more time, effort, or money than I need to? If I can maximize my efficiency and effectiveness, I may be able to reach my potential in multiple tasks at once. But if they are very different (requiring different skill sets, training schedules, etc.), I will be limited by my resources (time, energy, money) and not be able to compete as well as I want.