Pick yourself up a 500 model Scheduler remote
control. Then pressing the Spot & Clean buttons at the same time will activate the Docking mode on your 780. Of course you can also use the buttons to move the Roomba forward, left, and right as well as power on and power off. You can also place the Roomba into the MAX cleaning mode which should be done every 6 weeks or so for better battery life. The only thing you can't do is send a schedule.