I'm playing a campaing as the Serbs (early/normal/GA) and my game is going wonderfully, im holding most of the Balkans, except Constantinople, my financial situation is great and i've just recently reached year 1205 and i'm now producing all the quality troops that are available to the Serbs. There is only one minor problem that is preventing me to be fully happy with my current situation: my tzar only has three influence, and since i dont want to conquer too many provinces i'd like to know are there any other ways to gain more influence. (if i remember correctly you do get influence by conquering provinces, right?)

Well, thanks in advance.