if you're going on a diet:

[flamingsword]

There's a blog I get linked to regularly through my GoogleReader feed on logically taking apart sex-shame and other bullshit, GretaChristina. A while back she took apart the attitudes that she and our culture have to food, fat, shame, exercise, health, the bias towards attractiveness, and the peculiar way in which shame leads us to deliberately undermine our health to prove how much we "don't care". The hyperlinks she presents all lead to science blogs with hard evidence because she, unlike me, is a non-hyperbole sort of person. I think anyone wanting to lose weight should take a similar examination of themselves to accurately gauge what the difficulties are and share in a sense of community with the work through the tips and tricks of others who have been on this path to rational eating and exercise habits.

I cannot recommend anything more highly for this subject. Part 1, Part 2, & Part 3.