Yes, if you are about to mindlessly snack, take it out of your mind and make the announcement: "I am now eating this entire bowl of leftover pasta because I'm bored, not hungry, even though I know it will go right to my butt." If not working out is your issue. Say "I am not going to work out right now because I would prefer be lazy and not address the fact that I need to get healthy. I am making the decision to prolong and even worsen my health and make my weight loss journey take even longer." Chances are your statement will make you think better of it.
Would you get in a workout before your flight if there was a gym located at your terminal? HowStuffWorks looks at why there are so few in airports.