The purpose of the resume is not to get you a job, that part comes later. The purpose of the resume is to get you an interview. Knowing this, and keeping that at the forefront of your efforts, can make the difference between a good resume and a great one.
Most employers spend approximately fifteen to twenty seconds reviewing a resume before placing it on the stack of winners or rejects--a fact that can be incredibly disheartening. But having this bit of information should empower you to make the most of that brief window of time by writing an effective resume.
Keep your resume clear and concise. Leave plenty of white space by not cramming it with too much information. Arrange your career highlights and provide figures when appropriate, but remember a good resume should give your intended audience an overview of your accomplishments, not every single detail. Save that for the interview.