Is there a Science to Grocery Shopping?

Never shop hungry, as it is proven that you will fill your cart with unnecessary and unplanned purchases and go over budget.
Most of you go grocery shopping when you get paid or are low on household items. You choose to go whenever you have some spare time—often on the weekend. However, did you know that the time and day you hit the grocery store could be costing you? Believe it or not, experts say there is a science to grocery shopping, and if you make the effort to incorporate this into your schedule, you could see the savings add up.