Excellent article in the Wednesday Food section of the SF Chronicle, preserved on the sfgate website, on Kitchen Essentials: 10 techniques every cook should know.
Understanding cooking technique has been most helpful to me in coping with the substitutions and in reviewing potential recipes.
Of the techniques covered in this article, folding has been my favorite for years, even before wheat departed my cooking. When you can't rely on wheat to hold up your baking, eggs can step in to save the day. In searching for recipes that will work for us, I know those with beaten eggs can survive my rampant substitutions because the egg whites will do the heavy lifting.