Today's is a best-of Brian Lehrer Show, so we won't be taking any calls. But the comments page is always open!

With New Year's resolutions starting today, we look at a popular personal promise: to get fit and lose weight. Writer A.J. Jacobs on his efforts to follow all health advice out there; nutritionist Marion Nestle on everything you need to know about calories; and what's behind the 20-minute workout. Plus: author Jim Holt examines existence; listeners give each other advice; lessons learned from television; and comedian Penn Jillette on atheism. 

BBC World Service provides international news, analysis and information.

President Obama Expected to Sign Fiscal Cliff Bill | Reexamining America's Mental Health System | After a Spate of Mass Shootings, Oak Creek Victims Reflect on the Year  | Embracing Humiliation | Comets to Watch for in 2013 | Who Will Be the NFL's MVP? | Pulitzer-Prize Winning Photographer on Covering Tragedy

On today’s Leonard Lopate Show we’ll find out about the Economist’s special report on global obesity and what countries are doing to address it. Then violinist Midori talks about the 30th anniversary of her performing career. Landscape architect Kate Orff describes the environmental damage done along the Mississippi River system. And Monona Rossol talks about theater safely.

A mix of news, features, interviews and music from around the world presents an engaging portrait of the global community. Produced by BBC World Service, Public Radio International and WGBH Radio Boston.

Marketplace is not only about money and business, but about people, local economies and the world — and what it all means to us.

On Point is a hybrid of a talk program and a news-magazine covering each day's important news developments and conducting conversations with newsmakers and thinkers from all around the world.

For more than 25 years, The Diane Rehm Show has offered listeners thoughtful and lively conversations on an array of topics with many of the most distinguished people of our times.