This one is a great Linkedin trick. For all of you looking for a job.
I need you to write a cover leter to this linkedin job: [job description]. But I want you to include my experience and specalties while creating a cover letter for me. My CV info: [insert your CV text]. A couple of things to have in mind: don't start the proposal with ''dear hiring manager'', or ''dear sir/madam''. Make it more engaging, a bit witty, but professional. 
