On the first chapter, when you are escaping a hall from a Gun Ship (the area after you unlocked Mind Trick and escaped different barriers). Stop to the point in the middle and you will die instantly, upon death, you are given additional Force Points (to increase the quantity, you can stop at the middle part of the hall where there are Stormtroopers and breakable objects). With this trick, you can leave Starkiller running, stopping in the middle, and therefore, dying multiple times in the process to get infinite Force Points. There is a save point before the attack so you will not bother about restarting a part of the chapter.
After the area on the casino (2nd chapter) where a Carbonate War Droid freezes the door behind. Continue on the area until you find a Jabba Hutt Hologram with 3 Arcade Machines. Destroy these 3 machines and a Red Holocron will spawn on top. Grab it to receive this costume that lets you play as Guybrush Threepkiller from Monkey Island