How to save money and spend less? heres our situation ...

How can I help my husband spend less money? I know there’s something I can do.

He spends a lot of money on snacks and drinks at gas stations.

I grocery shop and make him lunch and dinner and sometimes he will take it and sometimes he wont.. He sometimes just lets the dinner i make waste.. I will say i have my faults but Im willing to improve, for starters, Im not the best cook, and My grocery budget is tight..

He says he gets tired of the same meals/ same things for lunch everyday.. He has to buy a emergy drink before work everyday..

Iv tried buying some snacks and drinks for at home so he wont buy them everyday and could just take them with him, seemed cheaper at the time, but he eats/ drinks them in a couple days.. so its like more than it would be just buying daily.. idk..

i guess what im asking is tips to spend less on snacks and drinks?

Recipe and lunch ideas so it doesnt get old and feel the same everyday while remembering tight food budget.

Grocery shopping tips if u have them?

I try to use coupons but im not the best, usually store brand is cheaper and taste just as good

and any other comments or suggestions you may have..

Thanks! If we can solve this and cut some of the wasteful spending out we would be a lot happier and our marriage would improve as this is where most of our arguments are baced from.