The first time I ever learned about the concept of a cover letter, I distinctly remember how it was explained to me: "It's like your resume, but longer." The reason that moment sticks out to me so much? It's completely wrong!
Yes, your cover letter should include some of the key skills, traits, and experience highlighted in your resume. But copying and pasting from there into your cover letter will most definitely turn recruiters off. Odds are they've already read your resume — why would you make them waste their time reading the same thing over again?
Cover letters are your opportunity to not only show that you have the background and knowledge needed to do the job well, but that you're also passionate, charismatic and well-informed. For many people, though, it's a daunting task. With so much information to convey, where do you get started?