If you have yet to grasp the critical importance of nutrition and healthy eating habits, just look around you: Our wellness-obsessed culture will surely remind you of that fact. Juice bars have replaced fast food restaurants, gluten-free has become the norm, and any given food establishment now makes an effort to cater to vegetarians, vegans, and the like. That said, focusing on what you put into your body certainly has a measured effect on your self-esteem and willpower—even something as simple as cutting out sugar or processed foods, for example, can improve focus and increase energy levels in the brain. Adopting some sort of routine in the health department—whether it's preparing your lunches a week in advance, sticking to a prescribed list of multi-vitamins, or only eating organic, home-grown foods—will make you feel better both mentally and physically.