When you want to improve a piece of writing, showing it to someone (such as a beta reader) is often a good idea. This doesn’t apply to everything, obviously, but it’s especially valuable for text intended for publication, or when you’re concerned about how the audience will react to what you’ve written.
Steven Pinker, in The Sense of Style (2014), recommends that you also ‘show a draft to yourself’ – preferably having spent time away from it. This too is sound advice. It’s not new, but I like the slant Pinker puts on it, that you should show it to yourself as though you were another person, which, in a sense proportionate to the time that has passed, you are. He says you may find yourself wondering, as he does:
‘What did I mean by that?’ or ‘How does this follow?’ or, all too often, ‘Who wrote this crap?’