Welcome your customers properly, satisfy their needs for food, drink and entertainment and give them the rest they deserve! Manage your reputation and that of your inn. Make commercial agreements with itinerant merchants and producers to keep your stocks constantly replenished while dealing with the hazards that can affect the production of resources (diseases, weather conditions, bandit attacks...).
Accomplish quests to make the world move, help your customers, join guilds to get their support, climb into the sphere of power or meet new characters. Use your relationships to help your business grow by getting help from powerful people or by putting obstacles in the way of your rivals (by eliminating them for example).