If you, like me, use your inbox for reminders, NudgeMail will be your friend:
NudgeMail provides one feature: it turns any e-mail client into a reminder system. So say you receive a message that necessitates a reply, but not until Friday. Simply forward the e-mail to “[email protected]” and, on Friday, the message will be sent back to you for response. You can also schedule items for particular dates; for example, for the 22nd of November, you would forward the message to “[email protected].”
You can send yourself any reminder directly by emailing [email protected] with the subject “Tomorrow” and the note to yourself in the body.
Launched yesterday, NudgeMail works on most any email platform and is free for now (the future may bring a “nominal fee for power users”). Signup. NudgeMail blog post, why we created NudgeMail.