Don’t trick yourself into thinking your writing is dull or lifeless just because you’re used to it.
And I don’t mean because you know what happens or you know what you wrote. I mean, there are particular turn-of-phrases and descriptions that you use all the time that are completely fresh and exciting to your readers. Don’t convince yourself that you have nothing new to say just because you’re used to how you say it. To someone out there, your “generic” word choice is unlike anything they’ve ever read before.
Only you can put words together the way you do.