In this case, it's my 13 year old son. He knows the prices of everything, and if it isn't a good deal, he won't let me buy it. He also makes menues and shopping lists. I've been saving a fortune since he took over. That is an excellent idea.
Grocery shopping can be very tempting.
The statement that coupons save money caught my attention. It is misleading, at best. If you are going to buy that particular brand at that time, a coupon will save you money, but otherwise it can be a little tricky. If the cost of the coupon brand is higher than other brands you might buy by more than the coupon value it can actually cost you extra. If it is for something you don't really want and it will rot in the fridge, it isn't much of a savings.