Some bad habits cause more trouble than others, and the nine that follow are the worst offenders. Shedding these habits will increase your productivity and allow you to enjoy the positive mood that comes with increased self-control.

1. Impulsively surfing the internet. It takes you 15 consecutive minutes of focus before you can fully engage in a task. Once you do, you fall into a euphoric state of increased productivity called flow. Research shows that people in a flow state are five times more productive than they otherwise would be. When you click out of your work because you get an itch to check the news, Facebook, a sports score, or what have you, this pulls you out of flow. This means you have to go through another 15 minutes of continuous focus to reenter the flow state. Click in and out of your work enough times, and you can go through an entire day without experiencing flow.