Boomerang for Gmail is a Firefox/Chrome plugin that lets you schedule easy recurring emails from your inbox.
Boomerang for Gmail makes it simple for you to schedule a recurring email. All you have to do is write a message as you normally would, then click ‘Schedule Recurring Message’ from the bottom of the Send Later menu.
From the menu, you can then choose the start date, frequency, day of the week to send, and end date. Whether you want to remind employees to submit biweekly payroll information, make sure your roommates pay the rent every month, or remind yourself to stick with a new habit every morning, Boomerang’s recurring messages feature will make short work of it.