Have your resume saved in the right format. Not every ATS can read documents in .doc or .docx format. So, to be on the safe side, always submit your resume as a PDF.  Also, in the event your resume does get past the ATS, you want to make sure the formatting stays 

the same. The best way to do that is by utilizing the PDF option.

The exact list of keywords an employer enters to the ATS varies, but you can figure out appropriate keywords by looking at the job description.  You will notice certain keywords come up over and over again. There may also be certain terminology or lingo that define the work of your 

profession. Utilize those keywords in context on your resume.

The ATS looks for keywords to help identify sections of the resume, so make sure each section of your resume is clearly labeled and uses consistent formatting. Those sections you should focus on include your headline, your experience summary, your work history, your 

education, and any additional experience.