On page 33 of Amy’s book, The Complete Tightwad Gazette, she discusses her price book. I used to have one of these and found it very helpful. However, due to the recession, prices are unstable on many items.
I shop (usually) two or three times a month. The prices on many items keep going up and I cannot keep up with it all.
Does a price book still work in your area? Do you have another method? Inquiring minds want to know.