I'm still working with the ideas in Marty Kendall's book (the link cited a few comments above). I like the concept in their book of finding and using the least amount of fasting/restriction/etc. needed by your individual body to get the job (weight loss, health) done and not push harder than that so the body doesn't rebel against too much demand on it from too long fasts/too much stress on the system so things backfire. At least that's how I'm currently interpreting their ideas. Measure blood sugars to know how your body reacts and what you need and not just what some one-size-fits-all plan suggests. I'm learning a lot about how different foods affect my blood sugar and when I'm really hungry or not.