• To continuously improve , it is crucial to pick up new skills fast.
• How do we increase our velocity of skill development in the best way possible?
• The key is to increase the number of repetitions in a given time interval.
• Soccer players in Brazil are a class apart from the rest of the world , because they play in a smaller field indoors , so more ball touches per player per unit time , which means a significantly faster feedback loop.
• Luckily, we know the three variables that matter the most to learn new skills fast: (1) The number of repetitions.; (2) The variety of situations in which those repetitions occur; and (3) The quality of feedback.
• Another key is to focus on the principle, not on the specific technique – For example, in the soccer practice scenario, the principle is getting comfortable in tight spaces with the ball. The technique, on the other hand, might focus on how to get by a defender. Focus on the meta skill not the specific skill
• The best way to develop those skills is to increase the speed of the game. More repetitions. More situations with different variations. More feedback.
• Focus on increasing the number of focused repetitions and the variety of situations under which they occur.
• Have a tight feedback loop where you are constantly getting high quality feedback on how to improve.

From Farnam Street’s : How to increase your velocity of skill development