One of the handiest tips gained from many decades of dieting is to drink an entire glass of tomato or V-8 juice with 2 heaping tablespoons of bran stirred into it. You can also use psyllium seed husks. The reason for this is to give your stomach something to satisfy the need for bulk right away in the morning, and because it's low-calorie and high fiber, that breakfast drink will get things moving later in the day without adding much to your daily caloric intake.