Sometimes I'll hear a phrase or a word and write it down in my little black notebook (a writer's best mate), then come back to it and work a plot around it.
“You don't want your jewelry to make you look fat. A lot of what's out there now does - you just wind up looking like a Christmas tree.”
“You have to understand the tone of the movie, because if it's supposed to be funny, it can be funny violent like the Home Alone stuff, but you have to really understand the tone of what you're doing and make the action work for that and for the character.”