The best thing to do is run. I lost 20 pounds in 1 month by running 2 miles a day and not eating any fatty or sugary foods and reducing my proportions. Here is a site that will tell you how many calories you need in a day to loose weight http://www.freedieting.com/tools/calorie_calculator.htm Water is suppose to increase your metabolism but its not going to make you rapidly loose weight. Exercise increases your metabolism way more and can keep it increased. Don t starve yourself either, it will come back to bite you. All it does is throws your body into a famine and it starts storing fat.
Drinking more water will help in a stable health.If you are healthy then you will not face problems like being fat having heavy weight.But direct a noticeable weight loss is not possible.
You should drink a lot of water AND eat food. You should never stop eating to lose weight. But yes, drinking lots of water can definitely help you lose weight.