Well, first tell us a bit about your character. It's hard to know how to help without info.
Here's a few general tips though.
-Get a good bow, upgrade it and carry a shitload of arrows. Ranged combat is extremely helpful.
-Before going to the Gargoyles, turn human, then summon Solaire just outside the door. He helps a lot.
-Lightning is their biggest weakness. If you haven't gotten the lightning resin yet, buy the Residence Key from the first merchant or kill him and go get it from the chest in the house. It's absurd just how much more damage the lightning does.
-The trick is to kill the first Gargoyle before the other even has a chance to get to you. Go for high damage.
-The fire is incredibly annoying. The trick is to never try to dodge it. Just block and you'll take less damage. If you can, equip a shield with hire Fire Resistance.
-You don't have to take the bosses in any defined order. I didn't fight the Gargoyles until I was well into the forest area
-LEARN. TO. PARRY. It's a bit hard to do, but extremely useful. It makes the Anor Londo castle exponentially easier and is easily the best way to kill the final boss.
-Upgrade Endurance and stay under 50% equip rate. Being under 25% is nice, but you'll take a hell of a lot more damage and you're not [i/]that[/i] much faster.
-Be sure to upgrade your weapons as much as you can. Upgrading armor is less essential.
-Buy the Crest Of Artorias as soon as you can. The are it opens is by far the best soul farming area in the entire game. You can make 7000 souls in under 5 minutes with little difficulty and then keep doing it over and over.
-Get good at running past enemies. Some bosses have hordes of mooks between them and the nearest bonfire and it just isn't worth it to fight through them every time.
-Class really doesn't matter much. Pyromancer is nice just because you start the game with the flame hand.
-Never put a single point in Resistance. It's useless.
And, I really hate to say this because it starts a litany of bad habits, but if all else fails, get the Drake Sword. Just Google the name and you'll find tutorials on how to get it. Stay away from it as long as you can though. It can become a crutch that cripples you late game.
krazykidd said:
If you are asking for help/looking at guides, you are doing it wrong.
This is simply incorrect. Do everything you can by yourself, but Dark Souls does a very poor job of explaining a lot of things. Don't be ashamed to look for help.