Good idea:
I was scrolling through Max's iPod, and he had a playlist for different years. He said the lists comprised of the songs that were particularly memorable to him at the time, so in essence, it was a musical autobiography.
Bad idea:
Most people don't use playlists on their iPod, simply relying on the "Shuffle Songs" feature. And end up hitting "skip" a lot, I suppose. Although they might not care enough to do even that.
Good idea:
Using your celebrity status to speak out about a problem, like JK Rowling and our "thin-obsessed" culture.
Bad idea:
Being a celebrity and talking too much about your past, like how your dad abused you. Really, you seemed totally fine to us.
Good idea:
Inside Man. Excellent acting and a serviceable script, although the conceit was visible far earlier than in most heist flicks. An enjoyable two hours.
Bad idea:
Showing up 15 minutes late to an interview. Diagonal streets are not my friends.