For me and my family, to cut down on costs and so I don't have to wonder each day 'what to cook'- I make a weekly menu... and then I base my grocery list on that. And then I ONLY BUY what is on that list. Thus, cutting down on costs.
This works for us, and has actually reduced our grocery bill each week.
I plan meals that I know my family likes. Easy stuff. Not recipes with a lot of ingredients... but rather, recipes that has ingredients/staples that can be used for the rest of the week. Thereby, not 'wasting' food and money.
I am the type, that cooks from my head... I cook by taste and make my own 'recipes.' There are times I do use cookbooks/recipes... but for me, it is another hassle. So this works out for me, because I make low maintenance quick recipes that are still healthy and packed with taste, and yah, I do serve all food groups.
You just have to get creative, then you have flexibility. Not locked into a recipe or saying "I hope this recipe is good... the ingredients costs a lot..." etc. Then you don't waste food/money.
OR, what you can also do is: Do a Google search based on what you have on hand in the cupboard/fridge. If you only have say potatoes/onions/chicken/carrots/rice... then do a search on "recipes with potatoes, onions, chicken, carrots and rice" and then a ton of 'recipes' will some up in the search. AND being that the recipes are with items you ALREADY have... then you got an entree to make!
If you only buy things on "sale"... then make sure it is for staple items, or main ingredients that are flexible and can be made into anything! Then, you find a recipe for it, based on that method of Google searching I mentioned above. Then you will have a recipe for it.
BUT... the main thing is: plan ahead... look at the inserts in the paper and see what is on sale BEFORE you go to the store, then make your grocery list & weeks' menu, based on that. I do that sometimes too.
Then it is economical.
Then, for me... for the actual meal planning I already know what to cook all week because I have a 'menu' planned already. AND then, I do the cooking in the morning... and then dinner is all done early in the day, and I put it in serving dishes that can just be put in the fridge if there are any leftovers, and I already wash all the pots/pans that I used for cooking it. Then, I don't have it hanging over my head all day with dread. THEN, whenever we eat dinner, all I have to do is warm it up and we eat! Because for me/us... from the afternoon onward is just TOO busy for me to cook/prep dinner with all the kids around and the activities we do. So, I get all the cooking/dinner prep done in the morning right after I drop my daughter off at school. AND.... since this is my "routine", my son knows that, and I always have an activity for him to do while I cook AND I am also now teaching him to cook too and he assists me! So its a learning thing for him too. THEN, after I finish cooking, we go out... and we do what my son suggests or what I have planned.
So, the day is taken care of, AND the dinner, AND all the dish washing and planning! And by the time dinner rolls around, I just heat it up and that's it! Its all ready!
AND, by making a WEEKLY 'menu' AND grocery list... my hubby/family KNOWS what is going to be for dinner too... then they don't have to wonder and then think "what the heck is Mommy going to cook tonight...?"
Sometimes for inspiration, I go to the Martha Stewart website... and they have an "everyday" cooking recipe collection, for recipes that don't take long to cook, and they list everything you need to buy.
All the best,
Susan