You must be constantly on the hunt for ideas and concepts that will make you better. To get ideas you must go outside your field, broaden your interests. Read everything you can. Leave no stone unturned. Talk to coaches in a variety of sports. I am learning a ton each day from the volleyball coach I am working with. His drills are creative and have a purpose. Read blogs in other fields. Diversify, be a generalist. The pursuit of excellence is an ongoing process that has its own rewards.