If you are dying one hell of a lot, practice your moves. Memorise them by clearing out a screen ~ Such as the Entry level screen on the Fed. battle ship, in the hall way. Kill all the droids that come for you and then futz around with different moves and combos of moves.
There are a few that werk with Deadly precision when the charactor is running; pretty much a gauranteed Immediate Kill on opponants: As Qui Gon, in run mode, attack a group of driods, press the button with the cube on it.
This chop has wiped out a max of five enemy. Also: run then triangle button...timed right, leaves opening for indefenseable attack.
Laser Didging: Deflect the bolt at the last possible second, and I DO mean the last possible second, and you can sed it back at the shooter, destroy the enemy and have the bolt continue on.
This is especially effective in Barrage situations.
Ok this is for people who get stuck way too much. Pick a person who has a good force attack like Mace or Obi-wan. you also want him/her to have a good speacal item like something that explodes. This realy helps it does!!!!!!!!!!!!!