The two main groups I want to recommend to you are the Weston A. Price Foundation and Body & Soul. These keep me humming along health-wise and I bet they'll do the same for you.
This group offers solid science-based nutrition advice that is solid and life-enhancing. Their principles are based on the findings of researcher and dentist Dr. Weston A. Price, who travelled around the world to find the healthiest people. Their diets were varied but what they had in common is that they all ate the whole, real foods that their ancestors ate. On their website, westonaprice.org, and you'll find all sorts of articles on their dietary recommendations and on just about any health-related topic you can imagine!
Body & Soul offers the most affordable and effective workouts around! Programs include: boot camp, dance blast, power strength, cardio strength, cardio interval training, strength & flexibility, and gold. Classes are literally for every body and every fitness level! The "soul" part of the workout comes from the contemporary Christian music and prayer at the start and end of class. Go to their website, bodyandsoul.org and see if there's a class offered near you! (If not, maybe you could start one yourself!)