dieting rules

Lot of my friends are into popping Acai Berry Energy Supplement because like me, they also need to shed off some pounds. Though some people says that I don't need one since the body I have now is just fine with my height. But of course I feel the opposite, that is why I'd really do some real work out to achieve the ideal weight that I want. Anyways, I wonder if you have any suggestions on how to lose weight real fast? like work outs that I might try and all? let me know alright because I've been needing a whole lot of help for me to achieve the body size I've been dreaming for a long time now!