Unfortunately, simply stopping your bad habits, in and of itself, is an insufficient strategy. A much more effective plan is to substitute a new, more productive habit in one place of the one you’ve decided to end.
For example:
Sitting in front of the television at night is the enemy of good eating habits. You’re being bombarded with tremendously effective food commercials, and you’re in close proximity to the fridge. If you find that you’re most vulnerable to making poor eating choices at night, this could be the reason why. If you can terminate the night-time TV habit and substitute it with (for example), a bike ride, a lot of good things start to happen:
1) You’re away from the pervasive food commercials an the access to the fridge
2) You’re burning calories while you exercise
3) Exercises blunts your appetite
4) When you exercises, you’re more likely to eat right, as a way of further leveraging the good effects of the exercises