Consider the difference between random tactics and focused strategy.

If you are trying to make progress in an area of your life or business, or when you are fleshing out a new idea, then, at first, you have many new ideas and tactics. You say yes to all sorts of activities, ideas, material, etc…

However, eventually you must transition your energy from going wide and begin to go deep: Focus down on the vital few activities that move you toward your desired outcome.

This transition from yes to no is critical. Without it, you will have no focus, no strategy, and, thus, no meaningful progress.