I am on a diet at the moment which can work with or without exercise. I know some people have lost a few stone in only a few months with it. Good things from it to eat are: Eggs
Fruit
Vegetables
Meat
Yogurts
Pasta
Rice
And diet drinks.
Some things which speeds up weight lose are:
Lettuce
Tomatoes
Lemons
Mango
Strawberries
Watermelon
Peaches
Carrots
Bamboo shoots
Mushrooms
Onions
Thats all I can think of right now.