If you are talking about the initial pull of a group of mobs, be careful with Charge. In Wrath it might be ok, but it will do you good to practise how you will be tanking at higher level - so that the jump from WOTLK to Cata content won't be as jarring for you.
In Cataclysm, alot of dungeons have big pulls, patrols and also lota of mobs closely packed together (I'm looking at you Heroic Stonecore pre Ozruk). In these cases you will almost certainly be using CC, and it is almost always adviseable to pull with the CC and tank the remaining mobs further back. If you polymorph one mob and Hex another on a pull, and then you as a Warrior charge in and start shockwaving and thunderclapping to get aggro on the other two mobs, you will probably end up breaking CC, which could easily cause a wipe on some of the nastier heroics.
I am not sure whether you have Heroic Throw yet, but once you get it, make friends with it. Learn to use your ranged weapon to pull one melee mob from a distance, and then quickly heroic throw a caster, to silence him and get him running to you, not the other way round.
This form of pulling is much safer in Cataclysm, and wil allow you to drag a few mobs back to a safe place while others are CCed. If you are running with a Druid, you can also use Roots as a CC on melee mobs if you pull back, as you won't be in melee range of it.
On my paladin in an instance with big 5 mob pulls like Throne of the Tides, I will frequently get CC on two mobs, then Taunt 1, Avenger's Shield another and Judge a third, giving me abit of aggro on three seperate mobs and getting them running to me.
You can do a similar thing as a warrior, use a ranged weapon on one mob, heroic throw a second and then use taunt on a third as it starts getting close - any extra mobs can be CCed at your leisure. This is often much safer than charging in wildly on trash pulls. Charge comes into it's own on positional boss fights, where you need to quickly close the distance without the boss moving too much out of position - an example of this is Sartharion in Wrath of the Lich King, but a more currently example might be the aforementioned Ozruk in Stonecore - who you will ideally want to tank in the little tunnel behind him - by all means use Charge here, as it gets you into melee range quickly and prevents him running out of the tunnel, which can lead to irritating repositioning on a boss with some very nasty positional abilities.
Hope that's helped, I am not 100% 'au fait' with the exact warrior threat rotations but, practising pulling from a distance is extremely valuable and will stand you in good stead for later content.
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