Dead Man's Plea Go into Stratholme and rescue Ysida Harmon from Baron Rivendare.
Silithus Alliance & Horde
Dearest Natalia - (Step 1) Commander Mar'alith at Cenarion Hold in Silithus wants you to question the inhabitants of Bronzebeard's Encampment. You will find Bronzebeard's Encampment south of Cenarion Hold.
Once you have gathered the requested information, return to Commander Mar'alith.
Alterac Valley Horde Quest
The Battle for Alterac Enter Alterac Valley and defeat the dwarven general, Vanndar Stormpike. Then, return to Voggah Deathgrip in the Alterac Mountains.
The Restless Souls - Part II - (Step 2) Use Egan's Blaster on the ghostly and spectral citizens of Stratholme. When the restless spirits break free from their ghostly shells, use the blaster again - freedom will be theirs!
Free 15 Restless Spirits and return to Egan.
When Smokey Sings, I Get Violent Travel to Plaguewood, northwest of Light's Hope. Destroy 8 Scourge Structures by using Smokey's Special Compound at the Mark of Detonation planted inside each building. Smokey has had the Ziggurats and Slaughterhouses marked.
Once you plant the bomb, leave the building and marvel at your handiwork.
By the way, Smokey's Special Compound is rather... unstable.