When watching a TV show or movie, it’s fine to munch, but its important to choose the right munchie. Traditionally, Asian cultures have developed the habit of unshelling nuts for mindless munching because it fills you slower. Eating sunflower seeds, for example, will give you the taste of food without making a meal out of the snack.
And remember, like my mother always says, everything in moderation. (Moms are really smart!)