Smelt an iron ingot.

Construct a better pickaxe.

Harvest some leather.

Construct a furnace out of eight cobblestone blocks.

Construct one type of each tool (one pickaxe, one spade, one axe and one hoe).

Use planks and sticks to make a pickaxe.

Open your inventory.

Eat a piece of toast.

Trade every species of fish from the journal.

Water every sprout.

Complete the boating challenge in under 45 seconds.

Take a nice long nap.

Collect 10 golden feathers.