There are many opportunities in conversation to earn either light or dark side points. They are all pretty obvious too. There will usually be one or two altruistic or charitable responses, one or two selfish or psychopathic responses and sometimes one or two middle or neutral responses. Pick the first kind and you will almost always get light side points. Consistently pick these options and you will get to maximum light side shortly after leaving Telos, probably midway through the next planet you go to.