If you understand the way the body works, you can lose weight quite easily. =)
One way is to eat little things rather than big meals throughout the day. This works because the resting body burns an average of one calorie per minute. 60 an hour. So if you eat around 60-100 calories per hour, in little snacks througout the day (I find no more than 100 at a time, so eating things like a a yoghurt, a couple of apples, a piece of toast etc.) then the body will deal with this energy as it goes rather than getting an 'overdose' of calories and then storing them as fat. Which is what happens when you eat a large meal or lunch - of say 400 or 500 calories... the body only needs about a quarter of that, and all the rest gets stored and converted to fat which you then have to burn off! So if you eat small, the body will never have the chance to make any of that fat. And then while you rest at night, the body will have to burn around 60 x 8 (8 hours' worth of calories) while you feed it nothing, and so when you wake, you'll have lost some weight. This method definitely works.
Another method is to feed the body no carbs for a while (Atkins diet) and after 48 hours - if you stick religiously to this regime - the body will literally realise it's getting no sugar and switch to metabolising fat stored instead. This also definitely works. But it only works if you stick to no carbs, or else the body notices you're feeding it carbs again and switches back to carb metabolism, leaving the fat alone. You need to be disciplined to do it, but just a week of it and you can lose nearly a stone easily this way. I tried it a couple of years back and ate nothing but tinned tuna and salmon a couple of times a day, and 9 days later I was a stone lighter. It was difficult, but if you eat protein rather than vegetables it fills you up more and prevents you feeling as hungry. A balance of veg and protein is best for this diet - you don't have to do what Atkins advertisers tell you and eat dollops of mayonnaise on cheese for dinner (as if that's nice!?), just eat healithy without carbohydrates for several days. You will notice the difference. So, vegetables, meat and roughage without any added sugar will do. Avoid fruit, dairy products, sweets, chocolate/cakes/biscuits/crisps, bread, pasta, potatoes, cereals and rice.