He was a creepy-looking racist, sure, but you can’t pretend that HP Lovecraft hasn’t had a huge influence on weird fiction and horror in all it’s permutations.
The reason why time plays a great part in so many of my tales is that this element looms up in my mind as the most profoundly dramatic and grimly terrible thing in the universe. Conflict with time seems to me the most potent and fruitful theme in all human expression.
He also suggests first writing an outline in chronological order, and then in narrative order, which is a writing tip I’ve never come across before, but sounds like it could be an interesting way to think about your plot, the revelations therein, and how you might wish to reveal everything.
So, check it out, it’s relatively short, and you might pick up something useful.