Improved Revenge got buffed like you would not believe. Get it.
You also should probably choose between 5/5 Shield Spec and 0/3 Focused Rage, or 2/5 Shield Spec or 3/3 Focused Rage. The former gives you 3% more block (a small amount of mitigation), the latter gives you a higher Heroic Strike uptime (more threat). Pick which one you need more.
I'd also recommend the Shield Wall glyph, especially since you're specced into Improved Disciplines. Having that on a 2-minute cooldown is fantastic.
Get Glyph of Indomitability with your Triumph badges to replace one of your Brewfest trinks. It's a solid amount of EH with a decent clicky effect, I would only swap it out for magic bosses (Sindragosa, or that guy in Vault for example).
As far as stuff from ToC, you really need a new weapon and shield. There are both in ToC 10 (and a shield in ToC 25), there is also a nice tanking sword in H PoS that I can see you're after (hehe, in your stalker bar it says "30 Scourgelord Tyrannus kills Heroic Pit of Saron", you have horrible luck :-( ). However there is also a nice tank mace from Marrowgar 10 and a nice shield from Lootship 10, so going back to ToC is pretty optional. Your current gear is good enough for the content you're doing.
Nitpick: Skinning is not much of a tank profession. If you're serious about min/maxing, drop it for something else. Mining, or any crafting profession but Tailoring (or arguably Inscription) are good choices - Engineering stands out a bit because it gives you armor instead of stam.