Not only regular exercise, but following a proper diet is equally important for weight loss. If you don't find time to exercise, try to walk at least 15 to 20 minutes a day. That will be sufficient. The main goal is to burn the extra calories and reduce weight. Also, try to limit the intake of additional or unnecessary calories which would result into gaining weight. There are a number of diets which you can follow depending upon your schedule and suitability.