Have you noticed that the Christmas displays in stores have been replaced by sales on exercise equipment and self-improvement tools?

As we dive determinedly into our resolutions, how have you resolved to build up your faith muscles—not just your stomach muscles—this year?

I’m still surprised by the variety of people who have told me God has used this book to bolster their faith. From prominent executives at a reception hosted by Secretary of State Clinton last month to friends at a wedding just a few weeks before, people tell me God is using this book to challenge them to a renewed commitment to serving Christ in life and deed.

One of the most dramatic stories recently was from Steve Vines in Arizona. A little over a year ago, Steve had a six-figure salary, a Mercedes, and a Rolex. But his job was requiring a sacrifice of integrity that he couldn’t make. He quit to open what he hoped would be a lucrative consulting business with a small non-profit on the side. But when the consulting contracts didn’t materialize, Steve said, “I read the book and, for all intents and purposes, gave up the dream. Instead of working 80 hours a week, I’m going to work 35, and put God where he should’ve been all along.”

Beyond his job that merely “pays the bills,” his non-profit is wildly successful. In Pakistan, Steve worked with local Christians to start a sewing school that offers young women a safe and dignified way to earn a living. He also distributed 15,000 meals to the poor and homeless at Christmas, and he’s now working on opening another school.

How is God calling you to act out your faith this year? It doesn’t have to be as dramatic as Steve’s story. But could this be your time to take action?