I tend to wince when I see those ads on methods to get fit or shed pounds. As if we're all exactly the same, and need identical types of workout routines and diets to help ourselves.
For a start, many people put up with unbeknown low level allergy symptoms to specific food types. Just determining allergies like this itself can greatly improve a person's power levels.
In terms of exercise, once more - we are each and every one of us all different. For example, I find running to be detrimental for myself, hence I hired a private trainer, and as it turned out, my body type was much better suited to cycling or swimming. For different people, they swear blind that jogging has bettered their well being. Good luck to them, nevertheless we are all unique.
So it almost goes without saying, I recommend you get a personal trainer yourself to learn the way to get the most from your body and develop the best workout routines for you. They are ideal for someone who really doesn't know where to start in terms of diet and fitness. Moreover, for those who are gym-shy, a personal trainer will be there to make you feel relaxed, while motivating and pushing you to complete your routines. Think about how many people quit going to the gym after a short period of time - quite often it's because they can't find routines they enjoy/benefit from. A personal trainer will help get you through that initial difficult phase.
You don't need a personal coach for the rest of your life of course - however, they're there to point you in the best direction and to help you form healthy, life-long habits.