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.
Do not start writing the resume until you have any idea about the employer. Also, you should remember this important point: you need to show the employers what you can benefit them but not what you may benefit from them. The perfect resume must focus on the strength in necessary experience and skills that the employer may require from you. You will score more point with your knowledge about the employers and understanding of what they expect from you.