I'm on day 4 of Paleo. For me, food-wise this means grain-free, sugar-free, reducing dairy, and keeping carbs below 100 grams. I've also added on a magnesium supplement and take fish oil to balance out non-grassfed meats.
I find myself being really obsessive about Paleo. I track everything I eat in loseit's app. I'm thinking about food a lot and have been eating quite a bit (of eggs, meat, and bacon!). I also read a lot of PaleoHacks, Mark's Daily Apple, Archevore, and other sites.
I think part of the obsessiveness is in the need to track the carbs. It occurred to me -- I could just eat the same thing every day in order to not need that 'reassurance' provided by tracking. Eating the same breakfast and lunch Monday through Friday would be easy, and give me a feel for how a 'normal' dinner would feel. Then I could hack that diet as needed.