If you are going to spend the time required to write a good job application and resume, don't forget the most important part: get it proofread to make sure there are no spelling, punctuation or grammar errors, before you submit it. Proofreading it yourself will help (as long as you know your grammar, spelling and punctuation). But importantly, you also need to ask someone else (with a good knowledge of grammar, spelling and punctuation) to proof it for you because you, as the writer, will naturally miss errors that another person, who does not know the material, will not.
DO NOT TRUST SPELLCHECK!
I had better repeat that: DO NOT TRUST SPELLCHECK!
Do not trust spellcheck to remove your typos or correct your errors. It may pick up some of them but it will not find them all. It will leave glaring spelling mistakes in there that will make you look unprofessional and may cost you an interview, and a job.
So again, just in case you didn't hear me: DO NOT TRUST SPELLCHECK!After writing and editing your resume, get it proofread by someone who knows their stuff and it will look professional, you will look professional, and with a bit of luck, you'll get an interview.