My first piece of editing advice to anyone is this:
Before you hit “Publish” or “Send,” take a quick minute and read your words out loud.
Reading a piece of your writing out loud, intentionally, will help you catch typos and misspelled words. Plus, when you read your writing objectively, you’ll hear the tone of your words. Don’t assume people will understand what you mean. Nine times out of ten, I change a word or two. I’ll rephrase something to soften the tone. I’ll reword a sentence to make my meaning clearer.
Yes, you may look like an idiot in Starbucks. Yes, you may not think you have time.
But, trust me. It helps.