One thing that helped me when my kids were young, was to sit down and plan my meals weekly, before we went to the store. I still do this, and it takes the stress out of "what are we going to eat tonight?" I sat down with my Cooking Light magazine, or favorite cookbooks, and made my grocery list. And, I always have stuff on hand to make a simple dinner, like chicken thighs/breasts, ground turkey, etc. My kids were always interested in cooking, probably from years of coming to the store with us, and being involved in the planning. They both are good cooks as adults. The older one ate no veggies at all until he was well into his teen years and I never pushed it. His friends that were vegetarian exposed him to things and that did the trick. I just didn't obsess on any of it. He ate fruit, and I figured, well, he would live.
I try not to plan anything during the week, that takes more than 20-30 minutes to prepare and get to the table. I still use a lot of the Cooking Light recipes, because they have a "Fast to Prepare" section every month. I usually modify the recipes a bit, like take out the sugar, or use more spices.