Make Sure You Are Getting the Best Nutrition (that means eating right - good "whole foods") and Getting Enough Rest (yes that means going to bed and getting at least 5-6 hours of uninterrupted "deep" Sleep).
Why is this important? Your body runs on the nutrition you give it...much like your car. Bad gas in - Bad performance out. Your body runs much the same way.
If you eat poorly and get inadequate nutrition, your body suffers. You may not feel it now...but as you get older you will...guaranteed.
Athletes need to be especially concerned about this, because they are relying on their bodies to perform at state, national & world class levels, and too often athletes take nutrition lightly.
Without proper sleep and nutrition the body can't perform optimally.
Click on this link for then click on Digestive, Hydration, & Weight Management -- Maintenance, Training, & Competition -- Recuperative & Immune Building for my nutritional program for wrestlers http://www.leekemp.com/athletenutrition/