Acquire diamonds with your iron tools.

Stop starvation using Rotten Flesh.

Wear a full suit of Iron armour.

Use Shears to obtain wool from a sheep.

Catch and cook a fish!

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

Turn wheat into bread.

Smelt wood trunks using charcoal to make more charcoal.

Attack and destroy a monster.

Use planks and sticks to make a sword.

Construct a better pickaxe.

Craft a workbench with four blocks of wooden planks.

Open your inventory.