Once I've completed a manuscript and revised it to the point where I'm just plain sick of it, I let it rest a bit before coming back for what I call a "polish and shine".
Then I do the following:
1. Using the Find and Replace function in my Word document, I search for all the words used too frequently. Words that have no value and only add to the word count, like: well, so, began, just, that, was. These are my key words (ones I tend to overuse), yours might be different.
2. Scanning each located word, I delete or change it. Sometimes it can be changed to a more active verb or phrase (especially in the case of began and was). If I'm still unsure whether I like the changes I made on a specific page, I highlight the sentence in red and come back to it later.
3. I do the same with my physical descriptors. For my list of weaknesses, I automatically look up heart, breathe, breath and pulse. I use the Bookshelf Muse's fantastic emotions thesauraus to come up with better descriptors to add variety. I also consider using other senses in the scene--instead of sight, how about smell or touch, for example. Or how about some interiority instead?
Do you do anything similar?