Just going to point everyone who hasn’t already seen it in the direction of Stephen Graham Jones’s “Reeling in the Years” post on his website. Said post written in light of his hitting a rather particular milestone: Stephen’s looking at twenty books published (along with about 200 stories).
Now, Stephen is an amazing writer, insanely fast and talented at it, and is also one of the nicest people I know. And posts like this one reflect that. Because even if you’re not familiar with Stephen’s work (which is easy enough to correct, and well worth doing), you need to read that post: it’s bursting with some of the best, most honest, and deeply useful advice to writers I’ve read in ages.
Do yourself a favour and go have a look.