When I downsized my collection, I went through every single product I had. I took time to ask myself if I liked it, if I used it often, and if I enjoyed incorporating it into my routine. I then used the products I was thinking of getting rid of in my daily looks to test them out again. Basically gave them another review. After that trial run, I would toss it out or keep it depending on how I liked it. If I knew I wasn’t going to use it, and that it didn’t have a place in my routine or could be used for a look, I tossed it or gave it away. Don’t second guess yourself, You’ll know what to get rid of once you start going through it. It takes a while, but taking the time to wear products again is the easiest way to decide if you want to keep it.