Here’s an interesting experiment that will show you two things: you can draft without revising, and you can shut up your internal critic. This is not a way to compose, but a demonstration for yourself that you only do once.
Wait until you’re about to write something where little is at stake. Decide in general what you want to say, or write a plan. Note the time, and turn the screen off or cover it up so you can’t see it. Then type the piece as fast as you can. You have to watch your fingers to make sure they’re aligned correctly on the keys, so you don’t end up with something like this: ;olr yjod. When you think you’ve typed the whole thing, stop, turn on the screen, and note the time.
You will have typed this draft faster than you ever have before, quicker than you’ve ever imagined. And here’s the shocking part, the experience of everyone who’s ever tried this experiment. What you wrote will be better than what you normally turn in.
How can that be? Because you couldn’t see the screen, your Internal Critic couldn’t either. So he couldn’t criticize what you were writing and distract you. He couldn’t tell you how incompetent you are, or how everybody knows you’re a fraud. He couldn’t damage your confidence and make you slow and timid. He couldn’t make you revise and revise and revise even though you were just typing a draft.
You will have just succeeded in drafting without revising.