Option 1:
Write a letter from one character to another about a specific important event or development in the story. Your letter does not have to be long, but it should showcase the thoughts and feelings that the character has related to the event you are highlighting. It should be easy to see how this character views the situation.
Option 2:
Write a diary entry from one character's perspective about a significant event/detail in the story. Explain how this event impacted you. Did you realize something new? Did you solve a problem? The diary entry should show how you (the character) is dealing with something very significant to the story. (Thoughtshots would be great in this entry!)
*Include the title of the novel and the author at the top of your post!