One of the greatest writers of our time, John McPhee, had a lot to say about the writing process. A lot of it boils down to hard work, research, and edit, edit, edit.
Writing is selection. When you are making notes you are forever selecting. I left out more than I put down.
If something interests you, it goes in — if not, it stays out. That’s a crude way to assess things, but it’s all you’ve got.
I scoop up, say, ten times as much stuff as I’ll ultimately use.
And don’t forget:
Writing has to be fun at least once in a pale blue moon.