|In any diet, portion control can be a problem.
For example, your diet regimen may allow you to have a 3-ounce steak, but it's difficult to know how much steak it takes to make a 3-ounce serving.
The Journal of the American Dietetic Association offers this suggestion from the department of nutrition at Toronto Hospital:
If you look at your plate and see that the potatoes are covering half the surface, you know that's too much. If that 3-ounce steak covers the entire plate and is running over the edge, you know you should ask for a doggie bag.