What Is the Most Effective Way of Bridging the Intention-Behavior

What is the most effective way of bridging the intention-behavior gap in relation to health behaviors?

A) Increasing your self-motivation and fostering a desire to "be a better person"
B) Forming specific plans and setting clear goals
C) Having someone else monitor your behavior thoroughly
D) Forcing yourself to change your behavior suddenly, such as going cold turkey on cigarettes or starting an intensive new diet
E) There isn't much you can do to bridge the gap - some people are unable to motivate themselves enough to engage in regular health behaviors