Well, there is a section under the character rules, called Life and Death, that discusses how you can level up with XP. If there is another section that discusses the means by which one gains XP, I would like to know as well.
It's pretty obvious to everyone that you can gain XP from various types of travel. But it seems like I've also heard of people gaining XP from faction leader changes and something called anniversary XP. If someone could refer me to a place that detailed these items, that would be phenomenal.