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

Build some bookshelves to improve your enchantment table.

Bake a cake using wheat, sugar, milk and eggs!

Tame a Horse.

Wear a full suit of Iron armour.

Construct a Nether Portal.

Craft and place a sign.

Use Shears to obtain wool from a sheep.

Cook and eat a pork chop.

Catch and cook a fish!

Smelt an iron ingot.

Breed two cows with wheat.