weight gain
Sharon,
Without knowing your age, goals, condition, etc., it would be difficult to say how to gain weight. Generally, however, a sensible way would be to eat maybe six meals per day, including plenty of good-quality protein. Can you lift some weights to build muscle? Since muscle is heavier than fat, I would assume you would want the muscle. Eating foods which provide conjugated linoleic acid (CLA) will increase the muscle and limit the fat build-up. Don't over-do the weights. You don't want to look like California Gov. Arnold.
Mike