Star Wars: Battlefront Hints

Hint: Blaster Rifle Head Shots
The accuracy of the infantry's blaster rifle decreases dramatically the longer you shoot. However, the first 3-4 shots will almost always be dead on target, making it a deadly snipe tool even over moderately long distances if you keep the bursts short. A great benefit that comes from sniping with the blaster rifle is the rapid fire which can give you up to three head shot points per kill if you're aim is on. For these reasons, selecting the sharpshooter is really only necessary for sniping over really long distances. On most battlefields though, the scope on the blaster rifle should suffice, also greatly improving your chances at close encounters.

Hint: Kill a Jedi Hero
On the Bespin Platforms, Kamino, and The Rhen Var Citadel stages it is possible to blow Jedi Heroes off of the platforms and/or cliffs by using grenades/grenade launchers or heavy blaster cannons shooting near their feet.
Any Stage where a speeder bike is available. You can speed through Jedi Heroes at full speed and it will kill them instantly.
To kill a Jedi hero instantly just play a level with starfighters and land the starfighter on top of them