HELP!!!!! weight loss!!!!?

HELP!! right now im not where i want to be weight wise, im not very over weight but could stand to loss like 30. so i want to loose weight as fast a it can be i need to know which of these diets would be best for what im looking for, the zone, south beach, atkins or weight watchers?? except just keep in mind anything i do is on my own , im not going to group meetings or anything.