I've been obsessed with the author,
Tom Rath, and his books lately. i love learning, and he writes about how to be healthier and happier in concise, informative bites.
On the growing side, too, I just discovered that another of my favorite self-help authors has a podcast with little tips for happiness:
Happier With Gretchen Rubin. I've been listening to it while I walk, and it makes me want to walk longer. But I'm generally weird like that.