Emotions and moods are fickle little bastards that will rob you of self-actualization, so keep them at gunpoint. Just because modern culture tends to be morally and mentally flabby doesn't mean that you have to follow suit. Extra food and sleep is for homos. Chicks dig scars. Pain is Temporary.
Glory is forever.
Get your priorities straight, then put your blinders on and work, work, work. Discipline keeps you from migrating to the hospitals, clinics, pharmacies, and bars with the other escape artists who failed to develop self-control and need a chemical crutch to lean on. Discipline is what separates the also-rans from the bronze, the bronze from the silver, and the silver from the gold. Talent, Genius, and other natural endowments are like raw materials that must be extracted with the proper machinery, such as education and training. An ounce of sweat is worth a pound of ability.