As a mage, there is a lot of stuff you can get away with. Some of these tricks you might know already, or might be old. Enjoy
Labeled from best to worst:
Blast Wave Push Back
Now that blizzard added push backs, playing as fire has never been so fun. Let me just give you a list of the stuff you can do and how to do them:
1) Blocking off a spell, if you use blast wave on someone who is casting a spell it well cancel the spell if your timing is right... you wouldn't beleive the fights I have had where I have done this.
2) Blast waving people off stuff; This is by far my favorite, with blast wave you can blast wave people off cliffs, zepplins, and of course off there flying mounts.. Blast waving people off flying mounts is the FUNNEST THING EVER. There is a simple macro that you might know:
/Dismount
/Cast Blast Wave
All you need to do is get close to someone on there flying mount, and hit that magic macro.. then lightfall.
3) Blast waving mobs off cliffs in instances, I have done this a few times and it has saved a group wipe. When I was running my friend through UB, we pulled a add and we knew it was going to wipe us.. so I pulled it near the end of this cliff and blast waved it off... it took a good three miniutes for it to come all the way back up which saved us some time.
That somes up all the fun you can have with blast wave. Enjoy
Fake Blink
Blink is known for getting mages out of stuns, or for helping them kite.. but there is one more thing mages can do with blink, trick there enemys. To do Fake blink there are two different ways that I know:
(I personally use #2, it makes more since to me. )
1) You cast blink, then quickly turn your character, and you well end up blinking the other way. This is really hard to explain, but pretty much before your blink blinks you, you need to turn what ever direction.
2) You Face one direction, then quickly turn your chracter backwards with the mouse (you rotate your camera, then left click when your camera is turned to where you want) then blink.
I personally use #2, it makes more since to me.
You can also jump off a cliff, then blink back on.. it seems to be nerfed now but it was fun when it lasted, and you can still get away with doing it.. Here is how you do it..
1) Jump off cliff
2) using your right mouse button turn your character and blink back..
well take practice to do it now.
Anothing cool thing to do with blink is to jump off a cliff, then blink the second before you hit the ground. This well also take practice.
NOTE: A good video of using blink is ''Blink Master'' very entertaining. Blink Master By Spitty
Slow Fall
Slow fall is a very fun spell to use in certain situations, in AB you can use it to go down to the Gold mine, or to jump off Lumber Mill. Slow fall with rocket boots is like a shammy and a sponge (I hope that isn't copy righted lol) as this video shows on youtube [ame=http://www.youtube.com/watch?v=jqC9mIxMU8k&feature=related]YouTube - WoW: How to fly across WSG[/ame] by
By far its the best spell in the game.... maybe not but maybe the funnest spell..
EDIT: I don't know if that flag capping thing got nerfed or not need to test it.
Mirrior Image + Invis
I have done this a lot in arena, and duels.. You pretty much use mirror image, then invis.. this well send your targets pet at them, and confuse your enemys its pretty fun.. but maybe not worth two CD's
that concludes the tricks, sorry if I missed any.