The reverse of this is also true by the way. When applying for a job, include a real cover letter that shows you actually know something about the company you're applying for. It doesn't have to be long, but there's nothing that moves a resume to the bottom of the stack faster than a cover letter that obviously just has the company name and maybe a couple other fields swapped in. (Or in some cases even forgotten, so you get a cover letter where someone tells you how much they'd love to work for some other company!)