[4.0.1] Tanking

http://wowtal.com/#k=aul3BKfz.a5o.deathknight.

The core talents in any case are:

Blade Barrier
(2/3) Bladed Armor
Improved Blood Tap
Scarlet Fever
Bone Shield
Toughness
Abomination’s Might(if no one else in the raid has this buff) /Blood Parasite
Improved Blood Presence
Rune Tap
Will of the Necropolis
Vampiric Blood
Improved Death Strike
Crimson Scourge
Dancing Rune Weapon


Glyphs:

Prime:
1. Heart Strike - 30% more damage? Yes please!
2. Rune Strike - 10% more crit on the best Threat skill available.
3. Death Strike or Death and Decay – Depending on situation.

Major:
1. Pestilence - +5 Yard Range.
2. Blood Boil - +50% Range.
3. Dancing Rune Weapon - +50% Threat as long as DRW is active.

Minor:
There are several really interesting Glyphs here, like Death Grip, which resets the CD if the mob is immune to it. I haven’t tested this, but it should mean that you can taunt bosses with it, without any CD. If that’s true then this one is a must-have.
Other than that, you should Glyph as you like. I’ll probably go for Blood Tap and Horn of Winter.

[These are extracted from Ensidia Guide]

My personal suggestion is to start with DS (gives good initial treat + blood shield) followed by diseases, (RS whenever active) other than that juggle between DS and HS.