Free membership of slimming world, saving about £10. Even if you want to do the eating plan at home, this would enable you to get all the necessary materials which detail how the diet works and how it can help you lose weight. Saves buying some out of date books on ebay.
I joined Slimming World six months ago and have lost 87 1/2 pounds so far :)
I love it.
(PS, i dont know the price of Woman Magazine, sorry)