I'm a rather large fan of the paleo diet and it various off-shoots. If someone creates a thread for that I would certainly participate.
Halbred, the core of paleo's premise is to eat as our ancestors ate since our bodies evolved for ages on that diet. So there is a lot of personal research if you want to go "beyond the fad" and find the ideal for yourself. A lot of anthropological research on ancient and tribal diets are referenced in several quality works. Rules of thumb would be to avoid overly processed or refined foods like cakes and cheese whiz while eating more whole/natural/raw meats and produce. If your ancestors were herdsmen them your genes are probably more adapted to drink dairy and those with ancestors who did not have access to them tend to be lactose intolerant.
You can take it farther and try to "live" like your ancestors did. Some go overboard but, again, boiling down to the principals prove to have plenty of substance. Blue light from TV screens disrupts out sleep cycles and removing those light sources at night betters our sleep patterns.
Sitting in a chair for 8+ hours a day has lead to a rise in the need for more doctors and chiropractors. Our ancestors ran, played, hunted and fought. They had little need for chiropractors. You do need to watch what you read though. Some of the ideas can be quite hokey. But there is a growing body of science that supports the core principals that drive the diet.