Losing weight is often a long and monotonous process that isn't reflected right away. And results will vary from person-to-person depending on their weight, gender, health and sometimes genetics. The average person who's trying to lose weight should only drop 1-2 pounds a week; anything more than this is considered dangerous. Taking this fact into account, it's no wonder why fad diets, starving yourself, and only eating once a day isn't healthy.
Furthermore, it's important to mix a variety of exercises in with the better eating habits. Of course, when someone hears the word "exercise," the gym is always the first thing that comes to mind; however, most of the best exercises for losing weight don’t involve spending money on a gym membership.