I second everything mentioned above, and also recommend the book "Grain Brain" (look it up on Amazon). It is written by a neurosurgeon who makes a very compelling, leading edge (and medically unpopular) case against grains and gluten, its relationship to inflammation and its effects on Alzheimer's, and the uncanny links with other first world epidemics like diabetes, obesity, heart disease, etc. Its very easy to read and there is lots of research referenced throughout.
At 33 I recently went through a cardiac event, scary as it is at this age, and I am definitely not what you would call morbidly obese. This book will change your thinking and your habits A LOT.