yay!! congrats to you!!!!!!
my advice:
1. overplan. plan for your 80 minute class with 100 minutes of material. you never know what will work or what won't and you never want to be stuck with nothing for the kids to do.
2. be firm and be fair. if you are going to give extra credit ops to one person, be prepared to do it for everyone else. if you give a detention to the bad kid for talking out of turn, you need to be follow through on giving it to the honors student when he/she talks out of turn.
3. find out one thing about each kid. the more you can connect with them and relate the material to what they are interested in, the better able you will be to get and keep their attention.
4. plan in advance. its a pain in the butt, but plan your lessons a few days in advance and at the end of each day, write some notes down about what worked/didn't work, and then next year you won't have to write new lesson plans.
5. it is better to start out strict and stern. you can always lighten up after a while, but start off being strict. it will let them know who is in charge, especially if you're young.
6. never challenge a kid. don't embarrass them, ever. even if that kid has brought you to tears, never EVER call him/her out on it. don't put them on the spot. hold them accountable for what they do by talking to them privately, but do not do so in front of the other kids.
7. take time to do the little things. saying hi to the quietest kid in the room every morning, putting stickers on their homework, writing comments on their work shows that you care about what they do, call home for good reasons (little johnny was such a great helper today....) and for bad reasons (i'm just looking for a little support at home for little johnny because he seems to be calling out a lot lately).
8. don't tell you fellow teachers too much. the deal with all schools is that teachers love to gossip. dont let them know too much about your personal life. keep everything very vague. don't talk about teachers to other teachers. they all seem to know each other and you don't want to start any drama.
9. say no when you need to. if the principal asks you to take on an extra club when you are already involved in many other out of classroom activities, tell him/her you're very sorry, but that you need to say no, as you always want to do your very best and being involved in too much will wear you thin.
10. try your best to leave work at work. don't come home and let the thoughts of the kids/lessons/colleagues/plans/activities/administration take over your life. allow yourself an allotted time to vent to your SO (i did a halfhour) and when that time is up, be done with it and let it go.
very best of luck to you!! feel free to PM me at any time during the year (or before) if you need to vent/bounce ideas off me/chat/ask questions.