Never stop learning is key, however, variety is the spice of life. Naturally, most people don't have the 10k hours anything needs to become world class. For sub

Never stop learning is key, however, variety is the spice of life. Naturally, most people don't have the 10k hours anything needs to become world class. For subjects, you do want to go deep, look up DISSS and CaFE made popular by Tim Ferriss in the 4hour cookbook.