Your resume provides an employer with a first impression of you. It is the window into how professional you are, how well you communicate, and how much energy you typically put into any kind of work you do. To a potential employer, the time and care you have taken to develop a well-written resume is a demonstration of the kind of effort you will make in any job situation.
When you are finished with writing your resume make sure to check for the following: typos, grammar, punctuation, and spelling. Your attention to all of these factors tells an employer how much effort you will put into your job, and how important even the smallest detail is to you.
Make sure to proofread your resume over and over. When you think that it is perfect, ask others to read it just to make sure that there are no mistakes. Incorrect spellings or improper grammar will lead the reader to believe that you are lacking in these skills, or even worse that you did not care enough to take the time to proof read your work.