Painter's tape works great on whiteboards. The tape is milder so it won't leave the sticky residue that other types of tape will leave. I use painter's tape to seperate sections where I will write warmup journals on the whiteboard for each day of the week.
Edward DeBono's Six Thinking Caps
I have a bulletin board at the front of the room where I display and refer to Edward DeBono's six thinking caps throughout the year.
Classroom "Owl" Theme
"Owl" Stands for Outstanding Wise Learner!
I decorated the door to my room with an owl theme this year. My door says " 'Owl' make good choices today" and "This year is going to be a hoot!" and "Hoo goes there!"