Instead of trying to write for everyone, think of and write for the one person who you want to read your fiction book or who needs your non-fiction book. When you do this, you remove the critics and start a conversation using your natural voice. Suddenly, you’ll find yourself making progress!
When you’re truly using your natural voice–your true voice, it will feel like a conversation between friends versus you delving out information to anyone who will listen. It flows naturally and will be like sitting at dinner with a friend having a conversation instead of like you are standing on a stage trying to be heard over a crowd.