Think of just about anything that could go down in a city. Twice now my PC's have been pickpocketed, they did not even catch the fact the first time till the party scout found a potion missing before bed and the second time led to a chase through crowded street. Other things like guards picking on innocent gnomes because of racism, recapturing displacer beast meant for the arena after a wagon spills their cages in the streats, or maybe recovering a merchant daughters wedding ring from the bottom of the bay after she accidently dropped it. All of these are easy to incorporate into the game and lend a aspect of minor incidents that happen day to day. Hope these suggestions help.
