Execution, and nothing else!
Focus on the “how” you do things and not just on the “what” you do. There is no substitute for getting things done. All the planning in the world won’t get you to where you need to be. Aim, fire, aim, fire. Make a list every morning and tick off the tasks you complete as you go. Begin the day by focusing on the biggest tasks so you will build momentum and feel energized for the rest of the day. Better to iterate a hundred times to get the right feature right than to add a hundred more.