Been on a documentary kick lately, here's what I'd recommend.
Forks Over Knives
King Corn: You Are What You Eat
^ obvious food documentaries, if you aren't in the know about how bad they can be for you (junk, fast food, sodas, sugar, genetically modified foods etc) it's mainly what they're about. If you know but haven't seen these, check them out. One of the recent ones has me thinking of an all fruit/vegetable based diet.
Future By Design
Some futuristic shit, all on how we can possibly live in the future by making life easier w robots (TM) to how we can live more "green" (FBD). I highly recommend Transcendent Man, that shit is a trip.
The God Who Wasn't There
Maybe God Is Ill
Self explanatory, good documentaries.
Ape to Man (really recommend this)
The Science of Healing
Stress: Portrait of a Serial Killer
Incredible Human Machine
The Quantum Activist
There's more I can't think of, but add on. I recommend all these, they're great watches....
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