Use language that is appropriate to the industry or field, but be aware that extreme jargon may not speak to those who are intermediaries between you and the ultimate hiring manager. Get some objective feedback. Have others who have not worked as closely with the resume as you have read it for accuracy and typographical errors before you submit it. Ask questions about whether the resume communicates what you intended. Know your parts of speech.
Action verbs are the bedrock of good writing.
Use a KeyWord Summary at the top of your resume, choosing the top 20 or 30 words that represent your abilities. Hit the highlights. Remember that your resume is only one element of your job search strategy. It's important and needs to get you in the door, yet cover letters, email and fax communications and telephone interactions will extend the conversation and add further evidence of your ability to do the job. Be prepared to give more detail later.