if you had secret / flippable cards, you could solidify any secrets that your character is holding at the start of the game, with that information easily available and accessible to you and the narrator throughout the game, but secret to the other players until you reveal or flip that card. i'm thinking mainly dual natures or dual goals/subplots but it could work for assets too.

it would go a long way towards solving the problem of narrator's notes in character submissions going missing once a game has started, as I like to browse my cards as a quick way to refresh my character identity in my head before each move.