Make a list of all of your favorite dinners and put the approximate calorie total per serving next to each meal. Then have that list handy to refer to when you're deciding what to cook tonight. (Or write the calories per serving on the recipe.)
This helps me because it requires less thinking when I'm trying to decide what I want for dinner. Especially if I didn't plan ahead or plans changed. I can look at how many calories I have left in the day, then look at my list (which I have sorted by calorie count) and pick a meal that works.