The first circle in the diagram tells us to focus on an area where we can be a world expert. This is not as hard as it sounds, providing you look for a field specific to your experiences, where you have already made progress. Make sure it’s free from competing experts, then get your 10,000 hours, a benchmark for being an expert, into that space as soon as possible.
The second circle involves identifying your passion. Where your passion and your expertise collide is an agreeable place to be – work and play merge. The third circle is economic demand: it is simple common sense to focus on something others will pay for.