Please choose the correct ending to complete the given sentence: Health: [header] How to form a good habit [title] Set your goal. [step] Before you can begin to work on your new habit, it is worthwhile to consider your goal. Figure out exactly what you hope to accomplish.

Ending1: [title] Set out anything negative, painful, or distracting about the habit. [step] You might find it difficult to fit in or take care of it. Ending2: You are potentially living a lifestyle change that are very destructive to your self-image. You can help think about how this will reduce the frequency of your habit (drive long distances, mow lawns, walk through garbage, etc. Ending3: Make sure that your goal is specific, measurable, action oriented, realistic, and time bound (smart) to increase your chances of success. Consider what you want to achieve and get as detailed as you can. Ending4: This may be a great way to make sure you're performing well at your new workout. For example, you may want to strengthen your skills with interval training, or to improve your performance with exercises that focus on the leg muscles.

Answer format: ending1/ending2/ending3/ending4