Strategies To Lose Weight Fast

I need to lose at least 40 pounds so I can have a slim and lean sexy body. I also lack the energy level I used to have when I was lighter. I tried some diets and exercise, but without lasting effects. So, how can I lose that weight naturally and with herbs without compromising my nutritional health in the process? Please give an advice of some good solution/method on the internet on herbal weight loss that will work.