A person who has worked for a period of time with different employers must indeed find the task difficult. With such a short window of time to make an impression, it becomes even more important that the words you choose are impactful. The top of your resume should contain all important training and experience so the reader doesn't miss it. It would be easy to clutter your resume with items that are an important part of your work experience, but if that experience isn't relevant to your job application, it should be left out. Specific writing of a resume with a job in mind, rather than a general resume that can be forwarded to any employer, also requires additional information