Studying the game is at the heart of football and every sport. There are some talented ball players throughout the world, but the mental aspects of the game is what separates the good players from the great players. So try to watch games and understand the details of the game for your position.
Of course, the best way to get better is always just getting out and playing games as much as possible. Getting the proper amounts of training, rest, and nutrition is also a great way to begin to discipline yourself to achieve your football goals.
One of the best advice someone gave me is write down your (football) goals on a piece of paper, visualize yourself achieving your goals, and steadily work hard at it every day in someway.