For the sake of this final step in your writing process, highlight everything and select a font face and size that's bigger than usual.
This will greatly help you out throughout the entire proofreading process.
This may sound time-consuming, but this is actually the quickest way to check for awkward sentences, run-on sentences (info), parallelism errors info), word choice mistakes, sentence fluency (info), and the overall voice of the article.
It may come as a surprise to you just how many errors you can spot and correct when you read a text aloud compared to when you just scan everything with your eyes. This time around, make use of your ears to "listen" for mistakes. The mind actually works twice as much in analyzing every word when you read the sentences backwards.
Let's admit it—proofreading is a very boring job, and even though it doesn't require creativity, it does require that you be intensely focused.