1. Typos and grammatical errors
Your resume needs to be grammatically perfect. If it isn’t, employers will read between the lines and draw not-so-flattering conclusions about you
2. Lack of specifics
Employers need to understand what you’ve done and accomplished.
3. Attempting the “One–size–fits–all” approach
Employers want you to write a resume specifically for them. They expect you to clearly show how and why you fit the position in a specific organization.
4. Highlighting duties instead of accomplishments
Employers don’t care so much about what you’ve done as what you’ve accomplished in your various activities
5. Going on too long or cutting things too short
Despite what you may read or hear, there are no real rules governing resume length. Why? Because human beings, who have different preferences and expectations where resumes are concerned, will be reading it.
6. A bad objective
Employers do read your resume objective, but too often they plow through vague pufferies. Give employers something specific and, more importantly, something that focuses on their needs as well as your own.
7. No action verbs
Avoid using phrases like “responsible for.” Instead, use action verbs: “Resolved user questions as part of an IT help desk serving 4,000 students and staff.”
8. Leaving off important information
You may be tempted, for example, to eliminate mention of the jobs you’ve taken to earn extra money for school. Typically, however, the soft skills you’ve gained from these experiences (e.g., work ethic, time management) are more important to employers than you might think.
9. Visually too busy
If your resume is wall-to-wall text featuring five different fonts, it will most likely give the employer a headache. So show your resume to several other people before sending it out. Do they find it visually attractive? If what you have is hard on the eyes, revise.
10. Incorrect contact information
Double-check even the most minute, taken-for-granted details — sooner rather than later.
http://www.monster.com/career-advice/article/Avoid-the-Top-10-Resume-Mistakes