Keeping Track of Savings

I have been trying to get started to keep track of the savings I make with my coupons and sales shopping.  Yesterday it dawned on me that on the receipts they always tell me how much I save.  I decided to put 10% of the saved amount away.  I may have a jar labeled 10%, one labeled 20% on up to 50%.  Then I will start a savings account with my savings but also know how much I saved.  This seems less bulky than saving all the receipts and less tiresome than writing the savings   down.  At the end of the year I should know how much I saved.  I want to get started for the 2012 year for sure.