Make sure to have contact information on every page Nothing is worse than having an amazing resume and forgetting to add in contact information. Do not assume that if your resume is two pages that they will stay together either. Put your name and contact info at the top of every page and add in page numbers for a more professional look as well.
Use proper formatting Make sure to avoid excessive white space and to use the space on the page. Avoid using more than one page if possible definitely no more than two. Highlight key points with bullet lists and make sure your paragraphs are clear and concise. Resumes are not the time to be wordy. Be straight to the point.
Be honest Never lie or stretch the truth on your resume. If your employer finds out later you will probably be terminated. If your resume is lacking in some areas build those areas up honestly by increasing your skills instead of pretending. The truth will always come out eventually and it usually hurts you in the end.
Make your resume original Make sure your resume stands out from the crowd. Dont be afraid of trying something different or breaking from the mold. Sometimes a little creativity can garner enough attention to get your resume read which can make all the difference. Dont overdo it though. Being wacky or silly may be a part of your personality but usually is not a desirable quality in the work place. Photos are usually a bad idea as well. Be creative but keep it simple to avoid drawing attention away from what is really important.
An attractive resume template/outline makes it more powerful. Just as dressing smartly helps a candidate in an interview good formatting does the same for a resume. Looks do matter at all places in the real world and on paper. When you present yourself well you get noticed. Similarly when you present a good resume it will be noticed; otherwise it would be very easily find a bin to rest in.