Great thread. What I use up is the best indication of what I actually use, rather than just buy and toss. For example, I almost never use up fragrance. There have only been two that I have ever used up and replaced: Bulgari Green Tea and, back when Prescriptives was still alive, Calyx. Recently have used and replaced Lancôme Teint Miracle foundation and Estée Lauder Double-Wear mascara.