First Days - Setting Classroom Climate: "Teachers Are Terrific!: Great first day of school activity for setting classroom norms. I've seen this with what do you need from your teacher, but I like it with classmates as well.
I like the idea of having color coded cards or something similar when in the computer lab. Helps when students might feel the urge to yell out when their having difficulty with the computers or are unclear of what to click next.