Tame a Horse.

Smelt wood trunks using charcoal to make more charcoal.

Wear a full suit of Iron armour.

Use a Dried Kelp block as fuel in a furnace.

Turn wheat into bread.

Breed two cows with wheat.

Craft and place a sign.

Construct one type of each tool (one pickaxe, one spade, one axe and one hoe).

Attack and destroy a monster.

Use planks and sticks to make a sword.

Construct a furnace out of eight cobblestone blocks.

Craft a workbench with four blocks of wooden planks.