So about every six months or so I photograph my collection for inventory purposes. I keep an extensive spreadsheet not only of all the products in it but the number of each type and I can track how this has changed over time. It helps me keep the collection organized and manageable because it is quite large. It helps especially with needing to know when to get rid of a cream product or mascara because I can track how long I've had it.

Collection Album Warning very picture heavy

I am also more than happy to swatch anything, provide shade names of certain items, or share my thoughts on a product. I'm sharing because some were curious about this and asked me too and I enjoy seeing others collections/inventory systems.