You don’t want to beg for a job. You want a company to beg you to work for them. This involves you exceeding expectations at every turn: your resume, your interview, your references, etc. Your resume and cover letter are your first opportunities to shine, so you want to make sure they’re prefect. I meant to say “perfect”. Oops!
This is why proofreading is critical. I’ve seen excellent resumes from well-qualified candidates that indicated they had experience as a Sales Manger, which is slightly different from a Sales Manager. We didn’t pass on the applicant for that reason, but a misspelling like that can be a real red flag. I’ve also seen a cover letter where someone said they had “excellent profreading skills”. Needless to say, I had my doubts about their abilities.
Taking a few extra minutes to make sure your resume and cover letter are flawless is a small price to play in pursuit of blowing expectations out of the water. Remember: they’re going to be begging you to work for them.