I can usually do pretty well eating out if I have the self restraint 
A non-fried non-dairy protein appetizer plus a steamed or sauteed vegetable side is plenty for a meal. Shrimp cocktail, ceviche, seared beef (if you're vegetarian though, protein appetizers can be hard to find, but some restaurants have vegetarian bean salads or sides, or just a veggie plate). 
If you have someone else you can share small plates with, you can do really well. Even if the restaurant doesn't have a tapas menu per se, a selection of salads and appetizers shared between two to four people can be great. Even the best restaurants usually put more effort into appetizers than they do into the entrees. (and desserts... primacy and recency  ... but after a few consecutive days eating out even I can resist desserts)
... but after a few consecutive days eating out even I can resist desserts)
Definitely avoid dairy and wheat - even if you can tolerate them most of the time, most American adults have some degree of sensitivity, and when you go overboard like most of us do this time of year, you will notice it. Probiotics are a good idea, but make it non-dairy for the time being - soy yogurt, UNpasteurized sauerkraut (a new year's tradition anyway), miso soup, Bragg's cider vinegar, etc.
I feel your pain though. I think most people have had our fill by now of the five basic food groups (sugar, salt, starch, grease and alcohol). New Year's will be past soon enough.
				
			 
			
		 
			
				
			
			
				Speed comes from what you put behind you. - Judi Ketteler