A healthy lifestyle should focus on eating nourishing food most of the time - but not restricting yourself. Eating food that will keep your body healthy and happy - such as fruit, vegetables, lean protein and complex carbs - is very important, but if you restrict yourself completely, you will likely give up quickly. Write up a healthy diet plan, and pledge to stick to it 80% of the time. The other 20% of the time, you can enjoy any food that you want. You may find, over time, you lean more towards healthy foods anyway.