To the Smithy!
Acquire the Blacksmith

You acquire the blacksmith, Haedrig Eamon, at the beginning of Act I, during the quest "A Shattered Crown". If you haven't unlocked him yet, just keep doing quests and the story will send you to him eventually.

Steeling with Feeling
Achievement Rewards: Banner Pattern (X)
Level up the Blacksmith

You level up the blacksmith by training him - you have to pay gold for that. It costs 10,000 gold (5 times of training) to level him up from level 1 to level 2. Each level increases the cost of training.

Iron Heart
Raise the Blacksmith to level 5

A Life with Meaning
Achievement Reward: Banner Sigil (Anvil)
Raise the Blacksmith to level 10

Mind on the Metal
Achievement Reward:: Banner Shape (Druidic)
Teach the Blacksmith a recipe

Metalworking
Teach the Blacksmith 25 recipes

Heavy Metalworking
Teach the Blacksmith 50 recipes

Heavier Metalworking
Teach the Blacksmith 75 recipes

Death Metalworking
Achievement Reward: Banner Shape (Thorned)
Teach the Blacksmith 100 recipes

Get recipes from bosses, or trading, or purchase in Auction House

Return Business
Craft items that have each of the following 4 properties:
Strength
Intelligence
Dexterity
Vitality

Properties do not have to be all on a single item, can make multiple items with different properties.

Also achievement for 10 properties (Gorging the Forge) and 15 properties (Swing the Bloody Hammer) with a reward of Banner Sigil: Tome

Note: All achievements listed in this page award 10 points.