If you're watching your portion sizes of various foods at mealtimes, it can be tedious to use measuring cups. Here's a trick that's often used in cafeterias and professional kitchens: use an ice cream scoop with a retractable food release mechanism. They come in various sizes and make it easy to measure out a half cup serving or a tablespoon portion as long as you know how much the 'bowl' of the scoop contains (I've marked mine with permanent marker.) Quick, easy, and foolproof.
Ice cream scoops are especially good for the home baker counting calories. Place batter into muffin cups or scoop cookie dough onto a baking sheet -- each serving will be uniform in size. Together, a scoop & the SparkRecipe calculator will help you measure and account for your homemade treats.