Employ a theme, like this clever Hollywood classroom motif.

36 Clever DIY Ways To Decorate Your Classroom

Class Dojo display I created for my p5/6 classroom.

Included in this pack is: Dojo Cushion of Honour sign. Dojo Champion of the Week reward cards. Dojo club display cards and lettering. Whole class Dojo target display and lettering. Pictures of my own display created.

@Candice Gifford Harvick  You have a lot of this stuff already, but I really like a few of the bulletin boards...

Clutter-Free Classroom: Hollywood Theme Classrooms Edition}- for door -> could do "reely" great books or "Now Reading" sign. Students use index cards to track books they are reading and hang on classroom door.