Use the Bug Net or Big Bug Net to capture the following bugs in the Overworld. Bring them to the Potion Lady's husband in the Skyloft Bazaar along with the base potion to upgrade it.
Sit on the small stools or chairs that can be found in dungeons. After a few seconds your hearts will begin to refill.
When diving into some islands you may be surrounded by a group of creatures with colored tails. If you touch all of them before dropping to a certain altitude you will get a red rupee.
When played backwards, the theme song resembles "Zelda's Lullaby" from The Legend Of Zelda: The Ocarina Of Time.
Win the indicated number of battles in the Thunder Dragon's Lightning Round to unlock the corresponding bonus.
Defeat the final Boss and complete the game in Hero mode.