1) Don't eat lunch in the teachers' lounge.
2) Post instructions as often as possible on the board
3) Use teacher detentions for minor infractions
4) Procedure the heck out of everything
5) Don't ever be less than 100% nice and accommodating to clerks/receptionists
6) Think really hard about friending anyone from school on Facebook
7) Be firm, but kind.
8) Set life boundaries
9) Don't compare yourself to other teachers about things that don't matter.
10) Go in humble, ready to learn, and ready to laugh at yourself.
(Source: http://www.loveteachblog.com/2013/05/the-top-ten-things-i-wish-id-known-as.html)