Find ways to make healthier choices easy. Fill your time with healthy activities. Change one behavior at a time. Unhealthy behaviors develop over time, so replacing unhealthy behaviors with healthy ones takes time.
Many people have problems when they try to change too much too quickly. To improve your success, focus on one goal or change at a time. As new healthy behaviors become a habit, try adding another goal that contributes to the overall change you're striving for.