Thinking about trying out Arenas for some change of scenery, and need some advice.

[Atrocious]

The massive difference in that is that PVE is scripted, so you can comment on events you know that will happen. With PVP the only thing you can make a tactic for is against a certain setup and then still it's doubtful that it still works. Since for example, there's a huge difference in playstyles. One team could be recklessly offensive and the other team with the same setup can play very defensive. It just boils down to judging situations to where you see fit. I couldn't think of any "tips" to share.

Things that are generally usefull is knowing what spells/abilities every class has. And what cooldowns are on key spells/abilities. If a priest can cast a pain suppression every time your offensive cooldowns come free, you know that waiting for your offensive CD's and trying to burst then isn't gonna cut it. Watching some PVP vid's with commentary learns you most I think. Possibly read some guides for classes you're interested in.

You see, now you're actually providing me with some hints and tips.

I'll head back over to arenajunkies and see if I can find some vids that aren't of the stroke my epeen type(ie. see me obliterate x teams to some black metal/electroica tune).

I guess that a good idea might also be to solo PvP with the classes a bit first to learn a bit more?

[Littleburst]

You see, now you're actually providing me with some hints and tips.

I'll head back over to arenajunkies and see if I can find some vids that aren't of the stroke my epeen type(ie. see me obliterate x teams to some black metal/electroica tune).

I guess that a good idea might also be to solo PvP with the classes a bit first to learn a bit more?

Some things that can be helpful, it's mainly aimed at solo play though. But most things are basically the same for any team/comp/bracket.

A warrior explaining every move in a replay of an arena match. Switches are key.
http://warcraftmovies.com/movieview.php?id=190183

Besides arenajunkies http://www.skill-capped.com/ could be nice aswell. You need a registered account to gain acces though, haven't made on yet.