Use Measuring Cups Every Time
The best way to make sure you're eating appropriate serving sizes is to be scientific about it. Keep measuring cups and spoons handy when it comes to snacks. Don't just eyeball a cup of yogurt or freely pour granola on top. Chances are you'll overestimate and not even realize you're overeating. The extra small amounts of food you eat over time really add up, so if losing weight is on your mind, use measuring cups every time you snack.