Collection of rules/mechanics easily or often overlooked.

Rules / Mechanics

"Marry family" generates new family members, if there are no suitable candidates. An ignored candidate is not added to the family though.
Workers take an extra order to build an improvement in another families area.
Horses give instant 250gold, if destroyed by a urban building.
Generals get the same XP as their unit, which is an option to level them quickly. (uncertain: if xp from discipline is granted too)
Family religion is based on the number of followers in the family. The religion with most followers will become the family religion. The families head counts twice.
Invisible units (Schemer Scouts!) can enter truce-neighbour borders.

UI

There is an overview of all cities you got an agent network in -- click the agent icon on the top right of the city tab in the screen's top-right to access it.