Analyze Ads and Job Descriptions to Identify Key Words:

Learning how to analyze the key words that employers provide in help wanted ads and job descriptions is a key element in creating powerful resumes. For example, read the ad you found for an Accounts Receivable Manager below and see how many key words, phrases, or skill descriptions that it includes.
Accounts Receivable Manager
Seeking experienced A/R Manager to oversee accounts, manage billing and collections, train accounting and clerical staff, develop status reports for management and prepare monthly balance sheets. B.A. Degree or A.A. Degree with minimum of 2 years experience required.

Even though this ad is small it contains 12-13 key words or phrases that should be addressed in your resume. You can also key words from an ad like this to create headings for your resume such as:
Key Word Skill Headings
Management of A/R Accounts
Billing and Collections
Supervision of Accounting and Administrative Staff
Balance Sheet and Management Status Reports

From: http://www.free-resume-tips.com/10tips.html