I’m convinced one of the more significant tipping points in the maturation of a photographer is when you make that mention shift from “Damn, I only got 20 keepers from my photography today” to “wow! I have two keepers from today’s work!”.
That may seem like a trivial shift in mindset, but I don’t think it is. It’s a combination of a realization that you have a lot of good work in your library already, and an understanding that what you’re trying to do is add better work to it, not just more images. And that it’s okay to decide not to add stuff into your library just because it’s “good enough”.