How many appointments or tasks have you forgotten this week? What about emails you set aside to deal with later? Enter NudgeMail, a free-during-beta service that lets you mail reminders to appear in your inbox at a specific time in the future.
Simply write or forward an email to email@example.com and include the desired time or date in the subject line (anything from "3 hours" to "Sunday" to "September 12") -- or specify a command in the email address itself (e.g., firstname.lastname@example.org or email@example.com). Not quite ready for a NudgeMail when it arrives? Send a "snooze" email with your desired delay time in the subject line. The reminder will reappear after your designated interval.