I follow a lot of different people on many different avenues. All of them provide different ideas and points of view relating to diet and exercise. Each one has their own qualifications and different experiences. To fine tune my own diet, I take the ideas of everyone and fit them to fit my needs. I also weed out the ones that I don't think make sense. In the end it's all about fitting what you want and what will make you happy. I follow a number of people on twitter like @fit_chutney, @paleovillage, and @cnstantlyvaried. I follow a number of blogs like Against the Grain, Robb Wolf's website, Gary Taubes blog, Mark's Daily Apple, and more! Even if I don't agree with everything they have to say, I will still listen to their point of view and compare it to mine. If it is something I have never considered, I will give it a try (if it makes sense to me).
Science constantly changes and new ideas, points of view, and RECIPIES! come out all the time. Try to absorb as much as you can from many different sources. Sift through it all and go with what makes the most sense and, most importantly, what makes you the happiest and healthiest person you can be.
Words of Wisdom: What will inevitably doom is a lack of commitment to fundamentals.