It's tough to get into healthy habits, or any self-improvement habit. Without a lot of self-discipline, it's easy to fall back into old habits. But Matt D'Avella has an idea that takes some self-discipline, just not quite as much. He calls it the Two Day Rule, and it's a simple concept: Never skip the thing you're trying to accomplish more than two days in a row. It may be something as simple as going for a 30-minute walk. One day it's raining and you don't go. But the next day, you find a way to take that walk -- even if it means going out and buying yourself a new umbrella.
It makes a lot of sense, because one missed day is really not a big deal. But a second makes it that much easier to miss a third day, a week, a month. At which point you don't really remember the activity at all.
Take a look at the video.