As a type-2 diabetic, keeping accurate track of my food really matters in glucose control and to lose weight. After watching Biggest Loser, I thought I would try their tip of weighing food, rather than using measuring cups or eyeballing portions. I began weighing the food I had just measured, and I was shocked to see how great a difference there was. When you're measuring something high in calories, such as walnuts, you can easily goof and unknowinly add 100 high-fat calories!
I use a "Biggest Loser" scale by Taylor that I love. You can sit something on it and set to zero, so you're only weighing the food, not the dish. A button selects between ounces and grams. It goes up to 5 pounds capacity, great for making "5-Minute Bread" recipes.