HitMeLater - Snoozing Emails is Easier Than Setting Alarms

Press... Press and hold... Press... Press... Repeat.
If you hear two beeps now, the alarm is set. At least this alarm clock found in hotel rooms around the world does not wait for one of two buttons at its back (indistinguishable to the touch) to be pressed at just the right time.
In any event, sleeping over an email is easy with HitMeLater, the email SNOOZE button:
›› HitMeLater lets you get emails out of your inbox's way easily — and forwards them back to you after the desired while.