根据短文内容，从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Sometimes willpower is a lot like the television remote control—hard to find just when you want it most.  But there are ways to increase your willpower.
*Don’t try to change your economic situation, win a promotion or lose weight all on the same morning. Set one clear, specific goal and make a realistic plan to achieve. Extra willpower sometimes requires extra energy, so don’t spread yourself too thin. 
*Whatever your goal is, don’t expect to achieve it overnight,    If you are trying to kick a coffee habit, start by replacing your morning cup of coffee with a glass of water, instead of promising never to drink coffee again. Congratulate yourself on the small achievements. These successes help your willpower grow.
*    Ask friends, family or colleagues for assistance and tell them exactly how they can help. If your credit card bills have risen, for instance, let friends know that you are cutting back on expenses. Suggest having a common dinner instead of meeting at an expensive restaurant. Find a support group or organization related to your goal and attend their meetings. You can get valuable advice, understanding and information.
*If possible, change your environment to encourage positive behavior. Want to get in shape? Keep an extra set of workout clothes in your office as a reminder to stop by the gym on the way home. Quitting smoking?
  

A．Real success takes time.

B．Focus on one goal at a time.

C．Change your environment to change your life.

D．Improve your willpower by a support network.

E. Changing your behavior requires more than willpower.
F. Avoid bars or restaurants where you might be attracted to light up.
G. Breaking a bad habit or forming a new and healthy one can be difficult.