Keeping track of when my skincare expires helps me not buy or open new skincare until I’m finished using my current stuff! It was getting too much to keep track in my head. Now i have a calendar for when my skincare products will expire! I think this is way easier than writing with a sharpie on the product itself. I’m also super finicky about finishing skincare before they expire and not just throwing away half used products. I hope you guys try this and that it helps you too!