Brew a potion.

Cook and eat a pork chop.

Build some bookshelves to improve your enchantment table.

Play a music disc in a Jukebox.

Turn wheat into bread.

Harvest some leather.

Construct a better pickaxe.

Use planks and sticks to make a pickaxe.

Open your inventory.

You completed one Golden Arena course.

You completed 50 Network matches.

You used an Awakened SP Skill Boost in Arcade or Network Mode.

You studied 20 different Lessons.