All these help to have the potential for better focus. The term "better" being somewhat vague. LOL....Days, weeks, months, years of doing them all in the correct order to help you to achieve a high level of energy in order to have proper focus. Course, that is just a the physical level portion. The building of your mental focus on each shot taken is about your trust you build in yourself, your equipment and knowing each and every shot required on that run, will be impacted by your diet. You can probably say "Champions hydrate to be Champions." "Champions eat proper to be Champions" " Champions exercise to be Champions" " Champions focus on being Champions". What are you doing to work toward being a Champion?