I've simplified my makeup over the last couple of months. Long story short, I just don't wear a lot of the colors I used to love.
I have a massive makeup stash, even though I go through it periodically and sell / give away items. The last big one was early in the year, maybe February / March? I can't remember. But I moved over a hundred full sized shadows, loads of stuff. I've been trying to order only samples, maybe a full size here and there if I think I really need it. Which brings me back to the problem that my collection is again ridiculous.
I did a quick clean out of non-eye products today. I tossed a bunch of foundations and blushes, finishing powders and stuff I haven't used in a long time. Here's what I kept:

Two MUFE HD primers, one clear and one yellow. Photo courtesy sephora.

One Stila one step correct primer. Photo courtesy sephora. I wasn't sure if this stuff really worked at first, but I definitely see a difference if I don't use it.

NARS Sheer Glow foundation in Siberia, which is a tiny bit too yellow but helps minimize redness. Photo courtesy sephora.

Illamasqua Cream Foundation in CF110 and CF115

Illamasqua Cream Blush in Sob and Laid

Sonia Kashuk sponges from Target (photo courtesy Target). I love these sponges for both the NARS foundation and Illamasqua blush. The Illamasqua cream foundation has its own little sponge applicators.
I also kept
three mascaras (two Rimmel and an unopened L'oreal)
gel liner in Black Out and liner brush
two Avon liners I just got and haven't tried yet
I tossed a few foundations I had only used a few times, two UD blushes and one other blush, I don't even remember who it was. Too Faced, I think.
I threw out three blush / powder brushes, since I don't use powder blush anymore. I don't use any finishing powder either, my skin just doesn't like it. I have a slew of shadow brushes and use two on a daily basis, and will keep two or three others for backup. I bought a set of brushes a couple of years ago and most of them I just don't use. I'll keep my brow comb and lash curler.
I'll need to go through my lippies. There's some I have that I really like but just never get around to wearing them, so they'll have to go.
I binned a bunch of misc shadows, some Wet n' Wild and NYX palettes, some MUFE shadow creams I never use, four Too Faced shadow singles, an Urban Decay liner I don't really like, a MUFE liner that irritates my eyes if I don't get every teeny bit off, a couple of mascaras.
My UD Naked palette and Tarte for True Blood shadow collection will both be offered to a coworker. I've used 5 of the colors on the Naked palette (one for my brows!) and 4 of the Tarte shades, so it's silly to hang on to them. I know this coworker will love them, even though I've used them.
I need to set aside some time to tackle my shadow collection. I still have over 100 duplicate unopened full sizes that I'll sell off. Then I'll go through my binder, which has both samples and full sizes that I've put into baggies to help save space.
My collection will likely never be small, but I don't like it to suffocate me. Last time I cleared out the shadows I was more attached, but now that I'm wearing only a handful of shades, it'll be easier to let them go.
The results of this clean out will follow, if and when I ever get it done!