Schedule texts to remind people that you're meeting a day before you do. Are you a night owl? Schedule a text that you made at 1am to send at 8am!
You just thought of the funniest Tweet about Santa Clause...but it's July. Write out your Tweet now and get a reminder in December to send it.
You just met with a client and want to send a thank you email after the weekend. Write the email now while the details are fresh on your mind and send it out on Monday.