Appoint a chamberlain, who will decrease tax inefficiency by 10% and give you the ability to set tax rates. This gives you a possibility to influence center relation and prosperity. In addition he will take care of paying wages and collecting income as well as giving you the ability to secure your money.
Let your companions pick items from the chamberlain item pool (autoloot).
Appoint a constable who recruits and trains troops and provides information about garrisons and troops of lords.
Send patrols to important locations.
Appoint a chancellor who sends gifts to lords, settlements or ladies and messengers to lords.
Village and town riots may occur if the people hate you and have to pay high tax rates. Counter them or negotiate with the leader.
Threaten other kingdoms with war and try to squeeze money out of them.
If a faction sues for peace you will have the option to set terms.
Possiblity to send a gift to another faction (fief or money).
Send a spy to another kingdom.
Form an alliance, conclude a defensive pact, sign a trade agreement or conclude a non-aggression treaty with another faction.
Change the domestic policy of your kingdom. Choose between Centralization/Decentralization, Aristocracy/Plutocracy, Serfdom/Free subjects, Quality/Quantity which affects trade income, vassals armies size, AI army strength, relation between king and vassals as well as tax inefficiency.
When asking for a truce you will get the option to pay and/or give fiefs to conclude a truce.
If another faction recognizes you as king you will have the option to ask for help against your enemy and in certain circumstances support the decision by paying money.
Choose your faction culture so all your lords will recruit the same type of troops.