One of my treasured heirlooms is my Gram’s vintage Good Housekeeping cookbook. Its tattered and stained pages include a “Wartime Supplement” that describes how to cope with WWII food rationing, especially staples such as sugar and meat. The cookbook’s money-saving tips are still surprisingly relevant. While our grandparents may have been frugal from necessity, there’s a lot we can learn from their thriftiness on many different fronts. Here’s how to “waste not, want not” and save money like our grandparents did.