To give yourself time to fall asleep before Nora starts working, you can set it on a 30-minute delay. To do this, hold the on/off button on the Pebble for 1 second. The white light on the Pebble will glow for 30 minutes, indicating that it's in delayed mode. Smart Nora will automatically begin working after this period.
To end the delay and have Nora working immediately, press the on/off button again.