Research your food.
Before going out to eat, I always check the menu online to see what healthy choices are available to me. Sometimes, I strike out and the restaurant had nothing to offer that is up to par (Cheesecake Factory...Chipolte...). In those cases, I either eat half of the portion offered or pick a different restaurant.
Making a choice beforehand puts me in the driver's seat for sure. It saves me from impulse ordering and allows me to make an informed an educated choice. After all, there are a lot of bad foods available for consumption and maybe it's just me, but I would rather have my workouts go toward losing weight and building muscle than trying to reverse the poor decisions I made while out with friends.
So, before you head out to dinner next time, remember that Google is your friend. Do your research and you'll be on the road to wellness in no time.