I don't believe people snack out of "boredom". I think we snack because of physical or emotional cravings. Be conscious of what you eat, and if you find yourself reaching for something that isn't good for you or doesn't satisfy a real physical hunger, then ask yourself why and try to get to the bottom of it.
For me, eating simple carbs leads to cravings for more simple carbs, but if I stay away from them, I'm okay. If I find myself eating for emotional reasons, then I don't try to stop it unless it goes on for more than a few days. I figure a few days of overeating won't hurt me too much. And if it makes me feel better, then maybe it's worth it.