Try this test. Set your resume on the floor and stand over it. It ought to be the single most important point of your whole resume. If it's not, change it. If you're sending an electronic resume, make sure you use the same job titles and buzzwords the company does.
Companies use software to search for keywords.
List your e-mail address so the company will know you're familiar with computers. Unless your references are incredibly influential, don't bother listing them in the early stages. A lack of sincerity. Applying to dozens of companies at once is almost always a waste of time. Find a company that you really want to work for and a job that you really want to have, then go for it.