Craft and place a sign.

Construct an Enchantment Table.

Brew a potion.

Kill the Enderdragon.

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.

Do a barbell curl or benchpress at any gym.

Use a Pay 'n' Spray with wanted level.

Complete Big Smoke.

Construct a Dispenser.

Breed two cows with wheat.

Acquire diamonds with your iron tools.

Cook and eat a pork chop.