I'll tell you what I did. About eight years ago I bought lots and lots of china place settings on sale. They each came in their own box with a handle. I had nine of them, and I filled each one with cosmetics and toiletries, numbered them, inventoried the contents, and put them in a shelving unit in a closet off the bedroom. Then I lost the inventory sheet, put so much stuff in front of the boxes I couldn't get to them, and forgot they were there.
Recently I dug them out and rediscovered my mega stash. The toiletries, which I never opened, appear to be good, and I've started using them. Most of the makeup was fine. I pitched the mascaras because they were dried out, but everything else was usable. I rediscovered one I loved, Dr. Denese's Brown Sugar lip gloss. I have 40-year-old Yardley lip gloss that's still good, so 8 years doesn't faze me.
My advice, especially on GWP, is archive everything, forget you have it, and one day when you're feeling like breaking the budget with a beauty splurge, you can dig the stuff out of storage and enjoy.
P.S. I do have a nice Lori Grenier toile unit I keep on the vanity in the bathroom that keeps more current products to hand. You might look at her line, although I think the toile is no longer available.