Save Lucca's Mother:
In the event where Lucca's mother gets caught in the machine, walk to the lower rightmost accessible portion of the machine, press X, and you will be prompted to enter the code to stop it - L1, Circle, R1, Circle

Game Endings:
There are 13 Endings possible in this game, depending on when you choose to fight Lavos.

Ending01 Beyond Time Beat Lavos at the end of the game

Ending02 Reunion Beat Lavos while Chrono is 'dead'

Ending03 The Dream Project Beat Lavos in the Ocean Palace OR right after Marle joins your party (New Game+ only)

Ending04 The Successor of Guardia Beat Lavos as soon as you return from 600 AD [right telepod, again - only new game +]

Ending05 Good Night Beat Lavos as soon as you get to the End of Time [use bucket]

Ending06 Legendary Hero Beat Lavos before you get the Hero Medal, but after you hear Tata is the hero

Ending07 The Unknown Past Beat Lavos after getting the Hero Medal, but before the Masamune is fixed

Ending08 People of the Times Beat Lavos after you get the gate key back in 65,000,000 BC

Ending09 The Oath Beat Lavos after getting the Masamune fixed, but before opening the magic cave

Ending10 Dino Age Beat Lavos after defeating Magus, but before defeating Azala

Ending11 What the Prophet Seeks Beat Lavos after defeating Azala

Ending12 A Slide Show Beat Lavos after Schala uses her pendant, but before yours is powered

Ending13 Day of Lavos Fight Lavos and lose

New Game +:
If you beat Lavos in the game, press whatever slot your Memory Card is in, and move up past the first file and you will see the new option ''New Game +''. The diffrence between this mode is that you can get diffrent endings only by selecting this option, and you start off with your weapons, armors, head gears, and accesories, but not your characters.

Infinite Shelters:
This the trick to getting infinite shelters (heals all HP and MP at save point) early in the game. When you are in the Middle Ages, go to the forest outside Guardia Castle. Go south from the end nearest the castle and go right for a second or two. You should see a shaking bush. Approach it and talk to it. A monster runs off and leaves a shelter. This works each time you go back, so you can also make tons of money by selling them.

Infinite Power Tabs:
When on the black omen, you will come across a Tubster (Which at first looks like a tornado on the ground) Attack it and have Ayla use Charm, then escape, and go back through the door you came in and repeat.