If you discover yourself slipping back into old habits - returning to behaviors you committed to giving up in your pursuit of new goals - commit to not beating yourself up over failure. The nature of change isn't a straight line to the goal. There's an old saying saying that "defeat is temporary; only quitting makes it permanent." Instead, remember that tomorrow is another day to try again. Search for hidden opportunities to tweak, and, like the scientist searching for a cure for cancer, try again.