Spotlight episodes for big damn Heroes are pretty easy. Spotlight episodes for the Zeppo, the wallflower, the Watcher, those can be a bit trickier.
So look at the quieter, less automatically attention-getting characters - and players. Of course, there are players who pick these characters because they don't really want the spotlight, so don't drag them into it kicking and screaming. But there are also players who would like a "look at me" moment for their less front-and-centre characters or playing styles.
So look at ways to get them in trouble. Conspire with the player if they have ideas of the kinds of conflict they want, or the other players if you need them to step back and let our White Hats save the day.
Example: Not OK Computer
Adam, keyboards and main songwriter and borderline roadie, discovers that someone is using the college computer lab to create an AI that can hunt down anyone. Chances of it going rogue in three... two... one...