Grocery Sales usually run on 6 week cycle

Typically any given grocery item will hit its lowest sale price every 6 to 8 weeks. 40% is an okay deal, but it will usually go even lower. You typically want to search for BOGO deals which make the items 50% off before you even add coupons. (Via southernsavers.com web video)

So, find the lowest price, and stock up on the amount your family will need over the next 6 weeks.

That is something I really need to work on. I need to make my list of staple items, and figure out the quantities we use over 6 weeks.