Another solid guide, @
(you need an account to see links). Sincerity is key, and I definitely agree with Joe about eschewing the cliches that are so easy to paste. Really articulating what about that job/career makes you passionate is paramount; if you're struggling with this part, then it's probably a good sign that you're heading into the wrong line of work for you. I remember having an interview for a hardware store check-out job, being asked why I was passionate about hardware. I wasn't. It was a job to pay the bills during uni. Sometimes, you just need to be honest about that, especially if it is clearly intended to be a temporary stepping stone.