I'm on the primal diet and I have never lost so much weight so fast and constantly.
I did the" whole30" program for 30 days and stuck with the primal diet after.
So I would start off with this if you are looking to loose weight fast.
http://whole9life.com/2011/06/whole-30-v4/
I wold do this if your looking to change your lifestyle
http://www.marksdailyapple.com/primal-blueprint-101/
P.S I don't count calories
I eat like a beast.
I eat lots of fats.
I haven't lost any muscle mass in fact I look and feel alot stronger now.
Deadlift 500lbs
Bench 315lbs
Squat 600lbs
and that is just for my set that is not my max.
I don't really do much cardio really and if I do its only 4 minutes of H.I.I.T
I only lift 3 times a week at an hour at a time max.