Sinking lure:
[Family of Five]

The "super-secret" lure for catching the best fish in the fishing pond is located under a log in the middle of the pond with a piece of wood sticking up. To get it, look down and dive.

Turn Butterflies into Fairies:

Use your Deku stick to turn butterflies into fairies by placing the end of the stick on the butterfly carefully. If that doesn't work, try swinging the stick at it. Do it correctly, and it will turn into a fairy and you can put it in your bottle.

Ocarina Songs:
[Chris Rosell] (Not really a code, but for reference since Link has to be taught the song in the game.)
Zelda's Lullaby--C-left, C-up, C-right, C-left, Cup, C-right
Epona's Song--C-up, C-left, C-right, C-up, C-left, C-right
Saria's Song--C-down, C-right, C-left, C-down, C-right, C-left
Sun's Song--C-right, C-down, C-up, C-right, C-down, C-up
Song of Time--C-right, A, C-down, C-right, A, C-down
Song of Storms--A, C-down, C-up, A, C-down, C-up
Minuet of Forest--A, C-up, C-left, C-right. C-left, C-right
Bolero of Fire--C-down, A, C-down, A, C-right, C-down, C-right, C-down
Serenade of Water--A, C-down, C-right, C-right, C-left
Requiem of Spirit--A, C-down, A, C-right, C-down, A
Nocturne of Shadow--C-left, C-right, C-right, A, C-left, C-right, C-down
Prelude of Light--C-up, C-right, C-up, C-right, C-left, C-up

Infinite Fairy in a Bottle:
[[email protected]]

When you collect your first bottle, find a fairy and catch her in the bottle. Then anytime you are in a room where you can walk off the screen get close to the exit and use your fairy while Link is looking at you (towards the screen). If done correctly (gets easier with practice) the screen will shift behind him and he'll exit while the fairy is being used, and on the next screen, you will have gained all your life back and the fairy still in reserve.

Come back next week for more tricks!