Rule One: Don't eat when you're not physically hungry. Boredom, nervousness, loneliness, anger, etc. are not reasons to put food in your mouth.
Rule Two: Eat slowly. This allows your brain's "I'm full" response to catch up with your mouth. Take small servings, and after finishing wait a few minutes before getting another serving, to see if you really want it.
Rule Three: Eat well. A smaller serving of truly appetizing food will be much more satisfactory than a larger serving of "diet food" that tastes like cardboard.
I have learned by experience that following these three rules is also good for those of us who aren't diabetic.
Or, at least, it is for me.
Thanks for the advice. I am learning that a lot of things that diabetes is sort of forcing me into are good things that we should have been doing all along anyway: eat better, particularly by limiting carbs, eating more vegetables and being consistent in our diet, exercise more, drink less, even take better care of my teeth.
I'm fortunate in that I don't have a weight problem, so the amount of food isn't as much the issue as the type of food. Although, being type 1, insulin apparently can increase one's appetite, so I do have to pay attention to make sure I maintain my current weight.