I think many articles in magazines and books are so unrealistic, showing how 'easy' it is to lose weight and suggesting that weight loss is a steady downward line.
It isn't, not on any diet, some people really struggle and even when you are successful in losing weight, the pattern will be of constant sudden drops and rises for which there is no explanation, plus times when it doesn't fall at all.
Being a bit of a nerd, I have a spreadsheet and I tracked my weight loss. I weigh myself every two days and actually seeing the way my weight fluctuated in the short term, but in the long term was creeping down, kept me on the straight and narrow. I was so delighted with my success I kept the spread sheet, so still have it. Ideally I still need to lose about 10 lbs more so I am running this campaign on the same spread sheet because it remind me it can be done.