Final Fantasy

Map:
Hold A and press Start during game play to display a map of the world.

Dragon Warrior reference:
Find the three tombs located next to the white magic shop in Elfland. The tombstone farthest to the left reads:

"Here lies Erdrick"
"873-866"
"R.I.P."

This is a direct reference to a character in the game Dragon Warrior.

Easy gil:
Acquire the ship from the pirates. Board the ship, and hold A and press B(55) times. A number-sliding game will appear. Complete this as fast as possible to get at least 100 gil.

Hint: Easy experience:
Northeast of the port town of Provaka is a two space wide peninsula with enemies from the Northern Continent. They offer a lot experience and are difficult to defeat unless you are around levels 12 or 13.

The following trick is an easy way a receive money and experience. As soon as you get the ship, go back to the first town and spend the night. Then, turn off the power, continue your game, go directly to your ship and go south. You will meet one to six Kyzuku. Go back to town, save, turn off the power, and repeat as many times as desired. Note: This does not work if you reset the NES, you must turn off the power.
Information in this section was contributed by Atma 666.

Inside of the Ice cave (the one with the floater) is an Eye protecting a chest (with the floater in it). The Eye is worth 800 experience and dies in one or two hits.
Information in this section was contributed by Atma 666.

Hint: Level up White Mages:
In Astos' Castle, the northwest castle, is a room with three treasure chests with Undeads guarding them. The two upper ones are Mummies. Use two Harm spells to wipe them out to get 150 to 300 experience, and 600 to 1200 experience for using just two spells. This is most useful immediately after getting the key from the elf prince.
Information in this section was contributed by Michael Bartholomew.

Hint: Adamant location:
The location of the Adamant needed for Excalibur is in the tower in the sky -- you need the chime and the cube. Go in the tower and continue to the place with eight ways to travel. Go in the bottom left diagonal and fight the enemy that guards it. Open the treasure chest to get the Adamant.

Hint: Zeus Glove:
Go to Bahamut's cave. Once you first enter, go to the bottom left part. The Zeus Glove will appear in the items screen if you are lucky -- There is a 1/300 chance of finding it.

Hint: Defeating Tiamat:
Open the chest in level 1 of the Sky Castle to get the Bane Sword. When used as an item, this sword will cast Bane. Use the Bane Sword sword as an item to defeat Tiamat in one round.

Hint: Invisible guard in castle:
In the first castle entered in the game, Castle Coneria, above Queen Jane's room is what appears to be a room with no one inside. Search around the room a bit, however, and you will realize that you can talk to someone although they are not there. After you rescue the princess, the message will change.