Pacify, Pacify, Pacify
Does it lead to overbite? Dependence? The nightmare of withdrawal? Who knows. What we do know is that the pacifier keeps little kids, well, pacified. And pacified child is a quiet one.
Keep multiple pacifiers handy for any trip and use them wisely -- perhaps not for the entire trip if you're not big on pacifiers, but at least during take off and landing during plane travel. The sucking can help avoid ear pain and the howling that results.
They're also great at encouraging car seat sleepiness, which could earn you a good hour or two of quiet driving.
Up next: Remember "punch buggy"?