Changing a behavior is not always easy. It can partly depend on believing in your ability to do the behavior and what you're asked to do. For example, you might strongly believe in your ability to walk for another five minutes per day, but have no confidence that you can eat two servings of fish next week. Behavioral scientists call this belief in your own ability to succeed self-efficacy. One way to strengthen your self-efficacy is to set small, achievable goals.
Success with smaller goals can greatly improve your ability to take charge of the larger ones.