You have two options for generating encounters. One is using the Story Element Interaction tables, which are designed to generate an infinite amount of random encounters. These are found in Chapter 14. There is also a table there which determines simple, open-ended urban events which could be interpreted in many ways. (eg: Fire in building / storm / election etc.). This could also be used. The other is method rolling for a premade encounter from the table below. Some of the encounters listed below will result in quests, the generation of which is covered in Chapter 7. Other rolls will result in a monster being encountered, which will take you to Chapter 16. Consult Chapter 3 for information on the number of encounters per day and other issues.
