Focus on the most importance: A resume or a resume both requires focusing points. You should go deeply into the most important points about your qualification and knowledge about the job and the company. You may make bold or italic important points (if printing). The length of your resume should not be more than 1 page and there must be a full name with signature at the end of the page. Also, do not forget that the content of the resume and it must not be different in information, especially important ones. However, it is neither a part nor a summary of your one. So, differentiate the it is function and resume.
Make your resume and resume differ from those of other candidates. As such, you should never start your resume with such general salutations as dear sir, or dear sirs,... Normally, when a company posts publicly a recruitment ad, it will surely address the name, address and contact number so as the resumes may be sent to correct address. Do not miss these important details and do not forget to start your resume professionally with clear address of the company and even, the name of the responsible person. The employer will understand that you have researched carefully about them and correct your resume before sending to them, and, you have gained a good score then!
Almost people who tend to seek a job understand that resume is the decisive factor to whether you can make it to the interview round or not. Moreover, do not forget that resume and resume is two sides of the one which show your outstanding capability. However, not everyone can know how to make his resume and resume become decisive to the employer. It is not about spending more time or providing more information in the resume that make that resume becomes well impressive to the employers.