A woman having a midnight snack(Rex Features)

A successful diet depends on a whole lot more than just cutting out fatty foods and running aimlessly in the park once or twice a week.

Shedding pounds - and keeping them off - takes careful planning and as with most things in life, preparation is key.

Failing to prepare your body and mind before embarking on a weight loss programme will only end in frustration and you might be put off dieting for life.

Remember, we are all different, so a winning approach to dieting for one person might not work at all for another.

Here is our list of 20 essential tips to prepare you for the diet that will change your life forever...