Editing help from Grammar Girl Mignon Fogarty for your own writing and/or to use with students:
At the end of a recent writing webcast, we distributed a Grammar Girl editing checklist that turned out to be so popular we decided to make it widely available. Print out the checklist and keep it on your desk as a handy reference to use when you're editing.
Click on the preceding hyperlinked text to get a copy of the Grammar Girl editing checklist. (from QuickAndDirtyTips.com)