TL;DR
Schedule a reminder for a useful time before a task is due.
Before you begin
Reminder delivery needs notification support and permission on the device or browser you use.
Key points
Open the task and its reminder controls.
Choose how far before the deadline to be reminded and the time of day.
Review the reminder after changing the deadline.
Keep the work session in your plan; a reminder is a prompt, not a completed task.
Related help