Hi!
I found a nice exploit to get some extra personal rating (although I dont need it).
If you die before your teammate(s), click "leave arena" and instantly press alt+f4. (the fight must still be going on when you leave). Often it doesnt count as a game for you. Maybe it was fixed with 2.4.1(I don't think so), but in 2.4 it still worked for a friend.
But be careful if you just do 3 games in a team to get their points, you wont get any, because you only have two or less games(although the personal rating is mostly irrelevant in that cases). If you've got the personal rating you desire, you will need someone to push your teamrating.
some fun thing, but totally useless:
If you are a rogue and in stealth and click your mount, there wont be the animation for mounting, you will just stand there until the cast is over. (I dont know if it's only client side)
Oh and with a macro you can use two trinkets at the same time even if they share cooldowns( /use 13 /use 14 ), for example two damage trinkets. (repost I think, not sure)
sorry for bad english
Edit:
If you are a druid and want to get on top of little hills were you normally cant get, pull a mob to one side of the hill, sleep/root/cyclone it, run to the other side and charge the mob when it is on the hill. (you need to have the 11 point feral talent). In front of orgrimmar there are many hills to do it.