Avenged sevenfold story new

Im thinking about writing a a7x fan story but I need help. How do you get ideas? Its gonna be like a kidnap one but not a super oh I'm gonna fall in love with you type it'd be different then my other stuff. So here's my question how do you get I'd ideas? Another thing I might be making on about a girl who moves next door the one of them but has slot of health issuses. What are your thoughts on that? On that note my other story will be slowly added if you have no idea what I'm saying it's called Help! There's a gang of vampires living next door to me or go on my profile.