Nothing sabotages your productivity quite like bad habits. They are insidious, creeping up on you slowly until you don't even notice the damage they're causing.

Bad habits slow you down, decrease your accuracy, make you less creative, and stifle your performance. Getting control of your bad habits is critical, and not just for productivity's sake. A University of Minnesota study found that people who exercise a high degree of self-control tend to be much happier than those who don't, both in the moment and in the long run.