I made a kobucha squash cake that was just horrifying. I misread the recipe and didn't notice that I was supposed to beat the eggs, butter and sugar for 8 minutes. I just tossed it all into a bowl, barely stirring, and it was like a gummy orange mess. The annoying thing is that I wasted pure maple syrup and a ton of spices. Ergh
I second the crockpot idea. I use mine at least 3 times a week. A great book is "COok once, Eat Twice: recipes for your crockpot." You cook one meal in the pot, and then there is a recipe to convert the leftovers the next day.
Quesadillas are incredibly easy, and you can make them healthy by using whole grain ones, and using some healthy ingredients like roasted peppers and canned lowfat refried beans.
I'm in grad school and work full time. What I usually go is make one big meat dish on the weekends, a roast chicken or a pot roast, and then the rest of the week I make salads, sandwiches, wraps and simple stirfrys. I also buy a ton of chicken breasts or sliced flank steak when it's on sale, and put an individual serving in a freezer bag with marinade (homemade or not) and frreeze the excess. Then I can just toss it into a pan with some frozen or fresh veggies when I get home.