TMR Frugal Living Tip #43 October 30, 2008 ThriftyMomma Frugal Living Tips, saving money Leave a comment Today’s thrifty tip is use the back of a used envelope or junk mail to write your shopping list. You are reusing a used item. Most envelopes are long enough to write a pretty long shopping list. You are saving money by using new paper and trees. Anything to Add? Leave a Comment!