Great habits are formed more easily by building an environment that is conducive to them.  When it comes to optimizing overall health, performance, appearance, and longevity, there's no question that having healthy eating habits is critical.  Make the habit of eating healthy close to fail-proof by stocking your fridge and shelves with high-quality foods and eliminating any sort of temptations that will interfere with your goals.  You will avoid decision fatigue, save time, and even avoid stress by stocking up on the same nutritious (and delicious) foods every time you visit the grocery store, or better yet, farmers market.