Train your mind to have lasting self-control.
For this habit, pick any one of the three steps and carry it out. You can pick a simple behavior to follow (or get rid of), or you can pick a difficult one. The important thing here is to actually follow through on any one of the steps. If you do that, you will be exercising your mind and your willpower, and you will be able to build strength to achieve the level of productivity you desire.