I made Scene Economy Cards for our BE game. They worked even better than I had hoped! You just print the file double-sided, cut them up, each player gets four cards (one of each), and the GM gets all the GM cards. Players can’t play both their Conflict and Building cards, so they’ll be left with at least one card at the end of the Maneuver.
Here’s a pic of how we used them in play to keep track of the scenes. Next time I’m going to lay them out in rows of five, but you get the idea.