Couple ideas . . .
1. Write down family friendly/favorite meals (breakfast can be dinner too) and set-up a 3-week rotation. Be sure to include ALL ingredients, even items you normally have on hand - just in case you run out.
2. Make each week-night same but different. For example, Mondays are taco night, but it can be beef, chicken, fish, show up as nachos or turn into burritos. Tuesdays are pizza night (1/2 cheese for the kids) with an array of toppings depending on my mood (plain salami or Thai chicken).
3. Over cook. If making taco filling or pasta sauce or anything that will freeze well, it's just as easy to double or triple the recipe and freeze portions for later.
4. Take an afternoon to prep. It sounds daunting at first, but if you prep your food in advance, you'll be more likely to WANT to cook. I usually do it on the day I do my shopping. Divide up the chicken breasts, and cube, filet or marinate what I need for the week. I will also peel and cut up carrots and celery sticks (easy snacking and easier to chop and add to salads).
5. I keep two main recipe binders - 1 for family favorites - tried and true and another for recipes I want to try in the future. Save these for the weekends when you have more time!