Here's something to try if you just feel like breezing through disc one:
When you get to the chocobo ranch you must catch a chocobo to cross the swamp. If you don't ride your chocobo, the Midgar Zolom will kill you. Right?
Wrong. You can kick his ass, and the ass of every other boss on the rest of the disc. How, you ask?
With Beta of course. But how will you ever survive that attack that does 2k to everyone in the party?
Well you aren't gonna get hit by it. You're going to bring in Aeris with a full limit bar into the fight with the Midgar Zolom and proceed to fight him like normal. You must have the enemy skill materia on you in this battle, but that is a given of course. When he gets into the low HP range and is getting ready for Beta you proceed to unleash Planet Protector. Now when he uses beta, it will do a whopping 0 damage to you and you will learn it. Now you kill him and move on to the rest of the disc.
Makes the first half of the game such a breeze. Go ahead, turn on your playstation and try it right now.