Create an Iron Golem.

Smelt Wood Trunks using Charcoal to make more Charcoal.

Use Shears to obtain wool from a Sheep.

Craft and place a Sign.

Travel by minecart to a point at least 500m in a single direction from where you started.

Mine or purchase 30 Emeralds.

Cook and eat a pork chop.

Kill the Enderdragon.

Construct an Enchantment Table.

Construct a Dispenser.

Use a saddle to ride a pig, then have the pig get hurt from fall damage while riding it.

Swim in lava while having the Fire Resistance effect.