I'm the biggest advocate of the foundations of good health.  You have to get these foundations right before you can even attempt to look at any other elements of our health.  It's just like building a house, if you don't have the foundations set - then how can you install the floors, walls or even consider putting the kitchen cupboards in!
Here is a sneak peek of the foundations, I've attached the PDF document below.  Feel free to download this and put it on your wall as a reminder!