Don't forget to sign the letter. It happens and always looks bad. Your resume summarizes relevant skills and experiences and provides a foundation for comparison with other job candidates. Your resume should be typed, never handwritten. Resumes should be as reader-friendly as possible.
Professionalism is important.
Sloppiness or typographical errors may result in your resume being relegated to the bottom of the pile. There are many styles of resumes. It may be helpful to look at sample resumes in order to get an idea of the best way to present yourself, or to work with a career counselor to develop your resume. Proofread, spell-check, and proofread again. You have heard it before, but it's important.