Final answer:
To complete all the items on a to-do list in Outlook, the Tasks feature should be kept updated. It allows for effective task management and offers setting up reminders and due dates.
Step-by-step explanation:
To stay organized and ensure you complete all the items on your to-do list in Outlook, you should keep Tasks updated. The Tasks feature in Outlook allows you to create, manage, and track tasks effectively. Whether you're setting up simple chores or complex projects, the Tasks function can help you keep everything in order. This feature offers various benefits including setting due dates, reminders, and categorization of tasks.
Meanwhile, Outlook's Inbox is for managing emails, the Calendar is useful for scheduling and meetings, and the Contacts are to store information about people you communicate with. However, for the specific purpose of managing a to-do list, Tasks is the most appropriate option provided by Outlook.