One problem, that whole "I look into the fridge and can't find what I want, so I'll go get what I want" attitude that I can blame on being American, but will just blame on me. What if I just ate what was in my fridge, even if I don't want spaghetti from yesterday, instead of leaving the house to grab some food "to go," which really means, "to go to my house and eat at the coffee table."
Wow, that might require things life self-control or resisting instant gratification. That's a novel idea.
But still, how do I plan meals that are: cost effective, efficient, healthy, and full of ingredients that won't end up in my trash can because I couldn't figure out how to use them again?