Have students fill this out in the beginning of the year. Then when it is time to choose authors for read-aloud books, prizes for Students of the Month, colors for student awards or folders, etc., Look at students' favorites list!
This would make a great procedure (Harry Wong). Count to five or hold up one finger at a time when the class needs to refocus. Discuss what occurs for each number at the beginning of the school year and eventually the reaction will be automatic.