Draw early on in the game
Speed is everything
Be careful, save every 20 minutes
Keep Squall in Yellow, it's fun
Keep your G.F.'s happy, but don't use them too often, your SeeD rankings go down... just like running away a lot.
Try finding the enemy's weakness and exploit, exploit, exploit!
If at first you don't succeed, try again!
Draw from all bosses, never know what you can get!
Have lots of fun!
Play cards alot, and morph almost every new monster you come across, sometimes more than once. It helps later in the game.
Spend you time drawing Melt from an enemy with Laguna in the 3rd disk, don't be afraid to stop the enemys to do so.
Too weak to kill an enemy? Use Melt to do maximum damage!
To use limit, use Aura or be at low health. If it doesn't apear right away, don't fret! Just keep hitting Triangle.

To get Squall's 2nd best weapon in the 1st disk:
In Galbadia Garden go play everyone cards there, collect as many cards as you can. Then use Quazlcoat's Ability 'Change cards to Items' and change Toonberry to Cutting Knife, fight the guys around Gulbadia Garden to get a lot of Bolts, get 2 of the card on the 5th page-1st card, and turn 3 Adamantian turtles into Shell. You don't need the magazine to buy the Weapon, you just need all the materials, and it will show up in the shop, the magazines are for you to know what items you need. Details by Sniper Wolf

Keep your levels low in the first disk, try changing everyone you encounter into cards. In the second disk, get your level up high, enemies are easy when you are at lvl 100. For lots of AP, in the 2nd-4th disk, fight the Sabotendar (Cactus men) in the Desert by/on Cactus Island. For lots of Exp, go to the island nearest to Hell. In the 3rd/4th disk, put on encounter nothing (Diablo Party Ability) and run around Island nearest to Hell and Heaven hitting [Okay] button for the best spells.

The only cheat I found (Cheat as in W-Item type) was being able to junction one magic to 5 different slots, on the same character. First you need the magic, say Ultima. Have 100 of them on Squall or whoever. Now you need to have Ultima junctioned on let's say, HP. Your other 3 Junctions are (For only using on 4), Attack, Elemental Defence, and Speed, put any type of magic on those, just remember what you put (ie. fire on Attack, shell on Elemental Defence, and Haste on Speed). Make sure you have no other Ultima, fire, shell, or haste on anyone else! Now go to the Magic screen, put 1 Ultima on Zell, Selphie, and Rinoa. Then trade fire for your 1 ultima on Selphie, shell for the 1 ultima on Zell, and haste for the 1 ultima on Rinoa. Go back to the Junction screen and admire! Don't take off Ultima or they all will go. If you messed up on any of these processes, start over, or you will be missing Ultimas on a few slots. You can give back haste and junk to Squall afterwards too. The maximum slots is 5, but you can do 2 or 3. ****This only works on the Japanese****

Ultima Weapon is at the bottom of the Underwater Reaserch Facility, the place where you got Bahamut. There are pretty nasty enemies down there, so be careful, like it matters if you have everyone at level 100, which you should. Also, have Squall's Best Weapon equiped. First, you climb down the vine, then go hit the control panel, it will take off 4 points. In order to succed, you need 10 points left over. Go down stairs, now go to the other control panel and take off 2 points. Go down and hit the control panel nearest to where you came down, take off 1. Now there is another control panel there, hit it and take 4 off, go through the door that opens and add 7 points back on. Go out and go down, take off 1 point from the control panel and go on the elevator. Take off 4 points to get past this door, then it's a matter of fighting/walking down to the bottom. When you get down there, kill off Squall then finish the battle/run away. Use raise to bring him back alive, and keep him in the yellow. Hit the control panel and after a long sceen, you fight Ultima Weapon. The key to this battle is having Squall's Speed and Attack up. Use his D-Move on Ultima. It took me 4 limits to kill him.

To beat Omega, you should have Squall, Rinoa, and Quistis in your party. Have everyone at max HP, highest evasion, highest speed, luck, and highest power. Have Death junctioned to status defence and for status attack, I heard don't put holy, but I put nothing just incase. Have Eden at level 50 or higher and life at 9,999. Try to have Squall's Lionheart, and have Squall enter the battle with Automatic Haste (Cerebus' Ability). Give Rinoa the ability to cast Melt and Leviathan's Fullcure. Give Quistis Eden, try to have him very happy so he goes fast. Before you enter the fight, enter a battle and kill off Squall. Leave the battle and cast Life1 on him or use a pheonix down, slow down the batlle speed to it's slowest. In the battle, have Squall use his Limit and Quistis use Eden, have Rinoa cast Melt on Ultima, any order, just do it. If you can't get Squall's limit, keep hitting triangle until you do. Just keep pounding Omega until he dies. Have Rinoa absorb Ultima's or use Omega's Ultima's against him. Have Quistis keep casting Eden, and Squall keep using his limits.

To meet Omega, you first need to get your main party to the switching point near the fountain. Have your other party, from the entrance go up the stairs, to the right and in the door, go down stairs, then pull the rope for the bell... you should have 60 seconds to switch party members and all, but 10 seconds is used up by Zell looking up at the bell. Switch the party and go in the room straight ahead. Omega Weapon is hard to miss, so just talk to him.