Ok calories are everything when losing weight, but don't get obsessed with counting them. Just listen to your natural hunger. Make common sense choices.

*Foods you drink and are convenient have a way of finding their way into your stomach easier than foods that need to be prepared and cut up.
*Foods that taste sweet and are snackable (such as low carb bars and nuts) are much easier to eat a lot of and should be watched and consumed in moderation.
*Using a lot of liquid fat (oil, butter, cream) can pad the calorie count a lot. Since these foods can hitch a "free ride" since they require no work to digest them, they can be eaten in enormous quantities before your mind can catch up with your stomach to tell you "hey, you're full, stop eating!". SO, you should be aware of how much of these you are putting in food.

In general, listen to your natural hunger and proceed with caution with foods that you can over eat on