Go to the fortune teller in the south part of Castle Town. She will tell you the location of all the Heart Pieces in the game for 10 rupees each.
Go to Lake Hylia as a wolf and play the song that gets Plumm near you. Speak to him and he’ll tell you the game will begin when you take flight. Play the song again and a Twilight bird will pick you up. Reach 10,000 points by hitting only the red targets for a big combo to earn a Heart Piece. If you play again and surpass your score, Plumm will give you 100 rupees.