This tip is about the art of fighting
Your Force powers is the best weapon you can use, provided that you use them well.
I try not to kill anybody if I have to. If I come upon a patrol of six stormtroopers, and I don't wan't to kill them, I take out the E-11 blaster, and run up to them. But before they can even start firing, I force pull them, so that their blasters go flying. Now go and pick up the blasters that the stormtroopers "dropped." If you have full ammo, fire blank shots into the ground, and air running to pick up everyones blasters.
If this sounds impossible, believe it. I went through an entire level without killing ANYBODY.
If you absolutly have to "dispatch" stormtroopers, try this
The Jedi Mind Trick is the weapon I use the most. This is what I do to take out a patrol of six stormtroopers. I use the lightsaber throughout the entire time. I sneak up so that they don't know that I'm there. I target one, and trick him. He will start shooting at the other stormtroopers. While they try to figure out whats happing, I burst in behind them, and force push them down. Using the medium style, I slash two of them before they can even get up. As the other three stormtroopers get up, I force jump in the air, so that I am behind them. I usually slash through two of them, and then use Force Grip on the last one. It takes a while to just wait there choking the stormtrooper. You can lift the trooper high in the air, and smash him into the ground. This takes care of him instantly. All this takes place while the one stormtrooper is tricked. I just leave him alone. He should be coming back to his "evil self" by now, so I use Force Speed to get out of the way.