For me it was advice from Dan Harmon: “Don’t try to prove you’re a good writer, you’ll never write anything. Try to prove you’re a bad writer and you’ll write everything.” Not perfect advice but it really does help me write when I’m being overly critical of my ideas.
I agree with this. I used to be unable to write anything because I felt like, if my work wasn’t read, it was useless and needlessly written. Now, I love writing and I’m able to do it every afternoon, it’s quite relaxing.