One of the most common writing tips is: read your writing out loud (or listen as someone else reads it).
This headline is a good example of why that's a good idea:
What they mean is that she received vile threats, but a quick reading makes it sound like she sent threats. Often reading something like this out loud makes you aware of the undesirable ambiguity.
Most computer systems include a text to speech function that will allow you to have a synthesized voice read what you write. It does sound rather robotic so it won't give you the nuances in dialogue, for example, but it's still useful.
