1.) Use a different font to edit than what you use to write. You'll see things differently because the words will look different on the page.
2.) Use different font colors to differentiate between points of view, scenes, etc to give yourself an idea of how everything balances.
3.) Use a text-to-speech programs (I use my Kindle) or read your draft aloud. I always pick up different things when listening vs. reading.
4.) Print a hard copy. I know if take a lot of paper and ink, but sometimes a computer screen just won't cut it.
5.) If you're using Word, utilize the document map in the side bar to see your chapter numbers. Don't want any duplicates!
Got any more tips for me?