Revising
Spell check to catch any glaring errors.
Proofread your resume several times, during several different sittings, on several different days.
Get feedback on grammar and content from a friend, family member, or colleague.
Closely tied to feedback, you should find an editor that will work with you during the writing and revising process. You need a sounding board for wording and another pair of eyes for proofreading.
