Permanent NPC portals to Dalaran (non-mage)

This guide shows you how to take advantage of the level 74 quest "The Magical Kingdom of Dalaran". The quest has no XP or rep and its follow up will only get you 2100-2310 XP and +10 Kirin Tor rep. Following this guide you will save many hours of flight time and gold.

Step 1: Get the quest from one of the following NPC's:

Alliance:
Baron Ulrik von Stromhearth (Valgarde, Howling Fjord)
Archmage Modera (Star's Rest, Dragonblight)
Vas the Unstable (Wintergarde, Dragonblight)
Magister Dath'omere (Valiance Keep, Borean Tundra)
Magistrix Haelenai (Amberpine Lodge, Grizzly Hills)
Horde:
Image of Archmage Aethas Sunreaver (Agmar's Hammer, Dragonblight)
Magistrix Kaelana (Warsong Hold, Borean Tundra)
Magister Varenthas (Vengeance Landing, Howling Fjord)
Magistrix Phaelista (Conquest Hold, Grizzly Hills)
Magister Tyr'ganal (Venomspite, Dragonblight).

Step 2: Keep the item "Kirin Tor Signet" in your inventory. If you destroy it or put it in your bank, the NPC's will not port you.

Step 3: NEVER complete the quest. As long as you have the quest, you will always have an instant port to Dalaran from Borean Tundra, Dragonblight, Howling Fjord and Grizzly Hills. Once you complete this quest, you no longer get to take advantage of it.