The Training room is a good place to learn how to use the Force and combos. To access this mode, press during the game button SELECT (Playstation 3) or Back (360) and choose option (Training Room).
Before every bigger fight, make sure that you assigned all points for upgrades. To do this, go to menu and choose the option "Force Upgrades"
During the game, you can obtain several types of the crystals. These crystals can be used in your lightsaber. Some of them only changing the color of the lightsaber, but others can increase damages or even generate damage from lightning. If you find the crystal, go to menu and check whether you can use it.
Holocrons, which you found before your dead, will be treated as yours and you don't have to collect them again.
The best strategy for AT-ST is keeping the safe distance and attacking by throwing the objects with the Force Grip.
The mechanical enemies (such as Purge Trooper, Droids) are most vulnerable on lightning.
If you will deplete the blue bar of the Force, withdrawn on several seconds from the fight and wait for the regeneration.
During the fight with some types of enemies, you can use "Quick Time Events". If such action will be available, you will see on the screen the buttons. To execute Quick Time Event, you will have to push the buttons in adequate order and time.