Like every class, the warrior rotation is about priority. Added onto that is managing enrage + bloodsurge procs effectively.
The normal priority of skills is this:
CS > BT > RB > Slam > Heroic Strike (@ rage levels 70+) / Cleave (@ targets > 2) > Whirlwind (@ targets greater >2)
Essentially, CS should be used on cooldown after you have at least one stack of sunder (from you or a tank) on the boss/mob. When glyphed, CS will stack up your sunder (on bosses I use 2 sunders and then CS on cooldown to maintain max stacks). The problem with CS is that if you use it with 0 to little rage in your pool, you have nothing to do afterward and end up wasting the armor pen.
The reason BT is in a higher priority than RB is simply because of the shorter cooldown. By use it before raging blow it will event out your rotation and allow you to use more skills per minute. RB does more damage than BT as Titan's Grip spec, but it doesn't proc Bloodsurge. The buff to slam makes this kinda huge.
Slam is interesting, I haven't fully read up on it after the buff, but I doubt it's priority changed. Use it when there's a proc. The real question with Slam is, however, if bloodsurge is active and BT comes off cooldown, do you BT then Slam or Slam then BT. The answer is Slam then BT as the next BT you use has a chance to proc another bloodsurge proc. It's ok to push back your BT a second for a slam proc.
Good slam Macro btw (Only allow you to use slam when instant cast):
#showtooltip Slam
/cast Slam
/stopcasting
Heroic Strike is really only used when you have 70 + rage and don't want to cap out on your next white swing. Use it wisely as it can cause rage starvation otherwise.
Cleave, like Heroic Strike is rage heavy, make sure you're not starving yourself when you use it, but make sure in AoE situations you're maintaining your 3 stacks of meat cleaver. Letting that fall off, while still AoEing hurts your dps more than not being able to hit a BT.
<20% priority of skills is this:
CS > RB > Execute
Obviously, you want to keep your stacks of sunder up during the last 20%, but the mob having no armor for a bit is nice for Executes too. Make sure you have a 5 stack of executioners to help generate rage during this phase. One thing most people forget is that RB still does like the most damage per rage, weave it into the rotation when it's off cooldown and you're enraged.
Lastly, make sure your gearing properly. With the new changes coming out, crit is moving into a position of importance even more so. Currently stat priority is set up like this. Make sure you get your 8% to hit (only need 5% from gear b/c of 3% from the precision talent)
Hit to 8% > Exp to 26 > Str > Crit > Hit to 27% (softcap) > Mastery > Haste
I'm not 100% sure, but mastery might be better than hit to 27% at a certain level of mastery, but if you follow the above you really can't go too wrong.
Gem for strength unless the socket bonus is good enough and you can put like crit/hit or str/crit in the socket to get it. The reverberating meta is the best one in the game for you, make sure it's active.
That's pretty much it. Experience is the next thing, which you just have to get over time while playing the warrior class. Hope this helps, even if it is just all thrown together just after I woke up today. Good luck!
edit: some spelling issues >_>
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