Calorie Sneak ups
I've written on my blog before about hidden factors that make you eat more. One way to combat calorie snack attacks is by having your snacks already planned out so you know exactly what you are eating. Another approach (below) from Yahoo Health Tips also works well. My recommendation would be to create a list of 10 'approved snacks' and their sizes so when you head to the kitchen for a snack you have choices laid out for you and know that they will all fit in your plan.
Sneaky Snack Approach
When you know how many calories are in your snack of choice, you're in a better position to adjust your calorie intake of other foods later, so your total caloric intake for the day stays on target. That's right -- you can't snack away without cutting back somewhere else. But knowing how many calories your chosen noshes contain -- be they fruit, veggies, and yogurt or higher-calorie snacks like cereal and savory crackers -- will help you modulate at mealtime.