Reading Pollan's books don't make me want to go to an extreme--in fact, quite the opposite. Pollan forces me to think about what I am putting in my mouth and the choices I make to eat. I love this list of rules that he has provided while still making it clear that you won't be able to follow all of them--choose those that speak to you and live by those. I am a huge fan of Pollan and his work, and I highly recommend every one of his books if you are interested in how our bodies have morphed (really, they have evolved) in the past several decades.
What rules have I chosen? Don't eat things my great-grandmother wouldn't recognize as food. If I can't describe to you what the ingredients look like, don't put it in my body. Eat smaller portions, and eat mostly plants. Just be sensible.
Most succinctly of all, though, I intend to follow Pollan's motto:
Eat Food. Not Too Much. Mostly Plants.