Here’s a loosening up guide I wrote for artists. With a little imagination, its principles apply to writers too. Its purpose is to give creators permission to access original material by temporarily suspending judgment.
A spiritual teacher once advised students to “work, but let go of the results.”
The free online guide will help you understand what this means. Click on the link. Each set of exercises is short, but they might help you find the work you are to do that nobody else can do–work that is not “like” someone else’s. Sound scary? It is, sort of, but you will astonish yourself.