Running is the best.
To lose 1 pound a week you will need a 3500 calories deficit a week or 500 a day. Find out how many calories you need to maintain your weight for a day. So if you average 2400 and maintain your weight you would reduce your caloric intake to 1900 from 2400. To lose even faster do aerobic exercises. Ensure you take your vitamins. I found a site with great weight-loss products at good prices:http://www.thriftystorez.com