I can currently recommend the following Podcasts:
Apple Quick Tip of the Week - it's short, to the point, and highlights features I didn't know existed.
NPR: Environment - is a collection of stories on the environment from various NPR shows throughout the week. Essentially, they've done the sifting for you on the specific subject matter.
NPR: Science Friday - is a wonderful show with various topics with a basis in science. Though, they don't speak over my head. Its actually quite day to day on average. I highlight a recent podcast about stress and the holiday season that might help many people out there.
Science Elements - is less everyday science compared to NPR: Science Friday. Interesting concepts and ideas that I might never come across in my day to day experiences though.
This American Life - podcasts of the radio show hosted by Ira Glass, stories of fact and fiction. Often engaging and insightful into various aspects of being human.
Those are currently my top five podcasts. I've been downloading and trying out other podcasts. Will definitely comeback with opinions on other podcasts as time goes by. Will also get back to experimenting with food soon as well.