I wanted to write more about this, but I don't have the throughput right now and the article is 5 days old at this point, so this shorter post will have to do. Michael Pollan, who is doing some of the best food writing out there right now, wrote an article in the most recent NY Times Magazine on how we should be thinking about eating. In it, he blames the rise of nutritionism (the emphasis on the nutrients contained in food rather than the food itself) for our increasingly poor diets. This goes in the must-read pile for sure, if only for the great "silence of the yams" pun. If you absolutely can't handle the length, skip to the "Beyond Nutritionism" section at the end for Pollan's rules of thumb for eating, my favorite of which is #5: "Pay more, eat less."
Update: Meg summarizes Pollan's rules of thumb with some notes of her own.