I've been writing for 6 hours, with few breaks. Only, I haven't really been writing. I've been editing. And editing. And re-editing. Reshaping my thoughts, re-wording my phrases, and re-saying every little thing.
Honestly, I don't feel like I've done much. But comparing the first paper and the final product, they're barely the same thing. No surprise, the finished product is volumes better.
Edit.
Rewrite.
Restate.
Reshape.
Improve.
Condense.
Reword.
Redraft.
It pays off.