One of the things that you can do to save money while grocery shopping is to make a list of what you are going to have for dinner for the next week and then shop off of that list. You then ad the lunch and breakfast items along with your other needs. I shop once per week for a family of 5 and do it for about 150 per week for everything, sometimes over and sometimes under.
If you start to do this weekly or bi weekly it will help your spending come down. I go on Friday because that is when we get paid and shop for Friday night thru Thursday night of the following week.
I do shop for bargains but I don't bother with coupons, I just choose not to but if you like them go for it.