The one thing I don't see mentioned here is spelling and grammar. Probably the single most important thing you will ever write that absolutely must not have any

The one thing I don't see mentioned here is spelling and grammar. Probably the single most important thing you will ever write that absolutely must not have any spelling or grammar errors is your resume. When I am reading resumes, as soon as I see a spelling or grammar error I toss the resume. To me it indicates that you don't have an attention to detail and you really don't care enough about getting a job to make sure your resume is flawless.