2. Bring goodies for the first major holiday/celebration (i.e. Halloween, Valentine's Day) that comes up.
3. If think of things that could be changed or improved, write them down, then sit on those notes for at least a month.
4. Avoid gossip. The best reply if someone says something gossipy to you is a non-committal "Ahh" or "Hmm."
5. Be relentlessly positive. No mention of anything bad going on in your non-work life.
6. Avoid saying things like "TGIF" or "at least it's Wednesday."