Ronald has a daily morning ritual that includes the following activities: exercising on the treadmill for an hour, reading the morning papers, and getting coffee from a café on his way to work.
Step-by-step explanation
Use a colon after an independent clause ("Ronald has a daily morning ritual that includes the following activities”) to introduce a list of particulars (“exercising on the treadmill for an hour, reading the morning papers, and getting coffee from a café on his way to work.”)