Per Amy's suggestion, I've been reading my latest manuscript out loud to myself, and DANG there are a lot of typos. I also abuse certain words. Without plopping the whole text into Wordle.net, I predict that my most common offenders are:
How embarrassing! I'm purging my text of unnecessary qualifiers. I definitely recommend reading your work out loud because you really don't catch the same problems when skimming or reading silently. It's a bit tough and awkward at first, but worth it.
On the plus side, by the time I send it along to my agent it'll be in cleaner shape.
My voice will also be hoarse.