Smelt Wood Trunks using Charcoal to make more Charcoal.

Stop starvation using Rotten Flesh.

Craft and place a Flower Pot.

Kill the Enderdragon.

Enter an End Portal.

Kill a skeleton with an arrow from more than 50 meters.

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

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

Relieve a Blaze of its rod.

Cook and eat a pork chop.

Construct a Nether Portal.

Construct an Enchantment Table.

Turn wheat into bread.