A resume should be a mirror image of you, your qualities and skills. It should be able to deliver those things that an employer would like to know about you before the personal interaction in the form of interview. A resume should be able to help both you as well as your employer to estimate if you are fit for the job and whether the job is fit for you.
Start with listing out all the important things you should include in a resume like Personal details, qualification, work experience, other achievements, etc. Educational qualification shows your intellectual expertise though many job openings nowadays look for skills than the degrees you accomplished.
Be careful while stating your work experience as it can tell your employer what qualities and abilities you have as well as what he could expect out of you. Definitely you would not have been in a previous job if you had not delivered your duties promptly. An employer will look at your resume for certain attributes like whether you can be a good leader or if you can effectively be a part of the team and if you are capable of contributing your service on your own.
You should also highlight your strength (as well as weakness) in resume. Make sure that you mention those things in your strength that an employer would like to have in his employee. Also highlight those special achievements that have significant impact on your career life.
Do not make your resume unnecessarily lengthy. Make it to the point and easy to understand. Give suitable headlines and make it bold so that your personal details, qualification, work experience, strength, other skills stand bold to the eyes of the reader in a proper order. Make your resume presentable with a good quality paper and proper formatting.