Applying for some position can be quite stressful as you can’t be sure that recruiters will choose you among all other candidates. However, you can always improve your chance by writing a spectacular cover letter that will present all your strengths, positive sides, and ambitions. I think that looking through some examples can be very helpful, especially on this website which is full of tips how to format business plan cover page and so on. Copying someone else’s cover letter is not an option. But reading some examples is the best alternatives. Good luck!