MakeupStash

How long makeup lasts after opening: what the 6M and 12M symbol means, a product-by-product PAO chart, the warning signs to toss early, and simple ways to track the date you opened each product.

How to start a Project Pan and actually finish it: choosing products, deciding how many to pan, tracking progress with a simple log, pairing it with a low buy, and knowing when to drop a product.

How to inventory your makeup collection: pulling everything out, which spreadsheet columns to use, formulas for expiry dates, five questions for decluttering, and how to keep the list up to date.