Indeed! I track usage by spreadsheet when I record my SOTD, and have a plan of attack to get some use out of soaps that don't get used very often. I set a goal as 'each soap must be used X times before I use something else' or 'each cost per shave must reach X amount before using a different soap'...it works for the most part.That's one side of rotation. I've a few soaps that hardly looked touched but I've had for a fair while. The next thing I think I will finish will be the MdC.