Healthy habits

If ever there was a time to up your fitness game, the arrival of the new year and the new decade is it. But after the allure of the new gym membership wears off, our sedentary habits, more often than not, consume our promise of daily workouts. It doesn't have to be this way, says health psychologist and author, Kelly McGonigal.

Katy Milkman played tennis at Princeton, and when she finished college, she went to the gym every day. But when she started grad school, her fitness routine went south.

"At the end of a long day of classes, I was exhausted," Milkman says. "Frankly, the last thing I wanted to do was drag myself to the gym. What I really wanted to do was watch TV or read Harry Potter."