This is a tip that even I need to keep reminding myself, especially now while I am currently in the process of writing my sixth book!
Your first draft is just what it sounds like — a first draft. Your job is to get your thoughts on paper. All you need to do is write the story.
Even though it may be tempting for some of us, don’t edit as you write your first draft. Get everything down and THEN go back to edit. Stay in the writing “zone” to maximize your productivity. If you need to, highlight a mistake, but fix it later.
Do you prefer to write without editing or is your natural tendency to edit as you go?