Dinner Ideas

In an effort to save money, we have decided to eat every dinner but 2 at home. (Date night is the only exception, which we do weekly as well as a night out with friends)
It comes at a good time, because Collin has gotten restless and rarely sits through an entire dinner out anyway, so this really saves the headache.

I know that this is a normal thing for people to do, but we've never done it! I'm wondering how I am going to find the time to figure out how to cook dinner (and going to the store) making it both taste good and be healthy each night. I also have no idea how to budget at the grocery store since we really don't buy anything that coupons are applicable for.
I really do follow the rule of "perimeter shopping" for 90% of what we buy at the store, meaning mostly produce, meat and dairy. Coupons seem to be for things like products made by big companies- Kraft, Pillsbury, etc. and we don't really buy much of that!

I am thinking that the best way to organize dinner into a less overwhelming process is to do each night of the week is a certain food?
Mondays- Mexican
Tuesday- a Time for Dinner Meal. these are awesome and easy!
Wed- date night, so no cooking!
Thurs- Nick said he would do this night, so I am assuming it will be alot of frozen foods (pizza, burritos etc) he says he will grill, but I'll believe that when I see it :)
Friday- Pizza
Saturday- this is a night we try to go out with friends, so I already see a change in the plan
Sunday- we used to ALWAYS order in on Sundays. They started out as hangover days, and now have evolved into family days which are just as busy. so this night will be tricky. I need some ideas for this. Maybe just classics, like lasagna, burgers etc?

Nick has also agreed to bring his lunch to work 3 days a week and not eat out at breakfast every day. (I know, who eats out 2 meals a day every day anyway? that's just crazy. My husband does- well now, did)

Wish me luck! I will post recipes for anything that is good or any ideas I come across to make this easier. Also, let me know if you have any ideas!