Techniques and tools are described for providing actionable communication reminders. For example, an item representing an original communication is displayed and a command to set up a reminder to respond to the original communication is accepted. The reminder is set up and, at a later time, is displayed. An input mechanism that can be actuated to respond to the communication may be provided at the later time. As another example, a suggested time to display the reminder and suggested contact information for responding to the original communication are displayed while setting up a reminder.