Hey guys just thought I'd give a contribution attemptHere will be a list of tips and tricks as I come up with them listed together for your convenience. If you have any extras please post and I'll add them to the main post.
Warriors: The majority of dps warriors will have a lovely little talent called Armored to the teeth: Armored to the Teeth - Spell - World of Warcraft
With this talent in mind you can use it to gain even more amazing AP! This is good for those fights where you need just a bit more DPS.
The item you'll be using is Indescructable Potion: Indestructible Potion - Item - World of Warcraft this gives you an extra 2000 armor (remember the talent mentioned earlier!) Popping this before a fight gives you extra AP as well as because you used it before the fight you will be able to reapply it when it fades aswell.
Paladin macro mana trick.
Two elements of paladins here Avenging Wrath: Avenging Wrath - Spell - World of Warcraft and Divine Plea: Divine Plea - Spell - World of Warcraft
Using these two abilities together, Divine plea reduces your healing by 25% but regenerates 25% mana which is a lot! Avenging wrath increases healing by 20% which means combining the two results in only 5% healing loss for a lot of mana gain!
Mage frosty tricks
As I'm sure people know frost rocksThere a few tricks that make them rock even more! Fingers of Frost: Fingers of Frost - Spell - World of Warcraft is definetly a very crafty talent. It gives you two procs of the ability however you can sneak in a 3rd spell that still gains the effect.
E.g. Frostbolt, Frostbolt, Deep freeze. This is a very awesome combo.
It can also be used to gain an ice lance at the end or anything you like
Full health poly trick: If your fighting against a warrior and he has you on quite low health, try to get a situation where he uses spell reflection and then you cast poly, this will reflect onto you and you will be put up to 100% health and can own that warrior!
General: Amazingly some people do not know this but when restocking flasks DO NOT BUY off the AH! Buy the mats off the AH and get a flask specced alchemist to craft them, it can get you a few nice extra flasks
Righteo this is all that comes to my mind currently but will certainly update as I get to it. If people have any areas they'd like some particular tricks or tips please post a reply to let me know.