I could find no collection of Useful Guides for Death Knights, and so decided to compile this list of useful links. It is nowhere near complete (Many of the resources listed are also incomplete, as the Death Knight is new for everyone).

Many of the guides cover common ground, quite a few explain the basics of the rune and runic power system, and the use of different Stats for a Death Knight

This is not complete, so please suggest resources that can be added, as I am sure more and more will be released as Wrath of the Lich King goes live, and I likely missed many resources while scanning the internet for Death knight Information.

General Resources.

http://deathknightbuilds.com/dkresources.html
Collection of links to useful Death Knight websites

DPS

http://elitistjerks.com/f31/t36303-death_knight_dps_compendium/
Guide to all aspects of Damage Dealing as a Death Knight, Incomplete.
All credit to Illundai of Elitist Jerks.

http://forums.worldofwarcraft.com/thread.html?topicId=12454666781&sid=1
Damage maximisation Guide, all credit to Kaelin of Kirin Tor (US)-[Updated for 3.0.8]

http://forums.worldofwarcraft.com/thread.html?topicId=12666297574&sid=1
Beginner's DPS guide

http://forums.worldofwarcraft.com/thread.html?topicId=12661601643&postId=126601510845&sid=1#0
How to damage maximise through rotations+speccs

http://forums.worldofwarcraft.com/thread.html?topicId=11676580289&sid=2000
Skill use prioritisation guide

Tanking

http://deathknight.info/forum/index.php?topic=2395.0
Guide to Death Knight Tanking, describing the use of all spells for a Death Knight tank, and the basic mechanics.

http://forums.worldofwarcraft.com/thread.html?topicId=13115791482&sid=1
Guide to achieving that vital 540 defense, using pre-Naxx gear.

http://forums.worldofwarcraft.com/thread.html?topicId=13129953065&sid=1
Guide to achieving an Uncrittable level of defense using Pre-Heroic Gear.

http://forums.wow-europe.com/thread.html?topicId=7372939567&;sid=1
Guide to achieving crit immunity without instancing (Recommended, it is far more indepth than the pre-heroic gear guide).

http://www.tankspot.com/forums/f14/40694-death-knight-aoe-spec-mt-spec-rotations.html
Tanking Guide (focusing on pure AoE tanking)

PVP

http://deathknight.info/forum/index.php?topic=666.0
Guide to Racials

http://deathknight.info/forum/index.php?topic=695.0
The uses of abilities in pvp and when to use them.

http://deathknight.info/forum/index.php?topic=1221.0
Deathknight pvp specc list



Starter Area Guides

http://azerothcookbook.com/go/classes/death-knight-classes
(PDF)

http://www.wrathguide.com/leveling/deathknight/
Comprehensive guide to the starter quests and how the area works

Beginner's Guides

http://forums.wow-europe.com/thread.html?topicId=6104912040&sid=1
Death Knight creation FaQ

http://forums.worldofwarcraft.com/thread.html?topicId=12454669561&sid=1
Beginner's guide to playing a Death Knight.

http://deathknight.info/forum/index.php?topic=1163.0
Death Knight Ability Compilation

http://www.deathknight.nl/spellrotations.html
Basic Guide to rotations

http://forums.wow-europe.com/post.html?forumId=7473139&postId=67901083111&op=2&sid=1
Another Beginner's guide

Theorycraft

Theorycraft for Death Knights is still in its infancy.

http://elitistjerks.com/f31/t36314-dktankcraft_spread_sheet/
Spreadsheet to work out your damage mitigation. The Talent Calculator only works with Microsoft Excel. All credit to Seryph of Kel'thuzad (US)


Builds

http://www.wowwiki.com/Death_knight_builds
Short wow wiki premade build list

http://deathknightbuilds.com/index.html
Guide to choosing talents and abilities, not just premade build templates

http://cruelflash.com/wow/shadow_of_death_info/
A explanation of the skills aquired while under the Shadow of Death unholy Talent.

Gear

http://deathknight.info/forum/index.php?topic=700.0
Guide to Pre Wrath of the Lich King Gear, listing the the gear you want in Outland, and the level requirements

http://www.afraidyet.net/forums/deathknights/77427-death-knight-pre-raid-dps-preperation.html#post10778
Aconisx of Blackrock's Pre-raid DPS lvl 80 Gear Guide

http://deathknight.info/forum/index.php?topic=3736.0
DPS gear list (more non-raiding gear is being added slowly). All credit to Deathzero of Deathknight.info

Macros and Addons

http://wow.curse.com/downloads/wow-addons/categories/death-knight.aspx
List of Curses Death Knight Addons

http://forums.worldofwarcraft.com/thread.html?topicId=12454538701&sid=1
One of Jaime's many guides on the US Forums (Addons)

http://forums.worldofwarcraft.com/thread.html?topicId=12454676816&sid=1
A Guide on the US forums taken from the Beta forums (Macros)

http://www.wowwiki.com/Useful_macros_for_death_knights
Wowwiki's Death Knight Macro List

http://forums.wow-europe.com/thread.html?topicId=6972177332&sid=1
Death Knight Macros and Addons compilation by Sevrina of Khadgar


Good luck in Northrend!

Hey Alburto! Alot has changed with the class since this thread was created, that's for sure. For now this will be unstuck, but feel free to update the lists and we can throw it back into the collection of guides that are awesome and DKtastic atop the forum! =D