We recommend always leaving your Base Unit on AND plugged in as it only has a 24 hour charge unplugged. Turning the Base Unit off can interrupt the Bluetooth connection and cause your Pebble to flash blue.
Rest assured that leaving the Base Unit on at all times will not harm the unit or its battery. If you experience a flashing blue light on your Pebble, you can reset your connection using the process contained in the following article
To turn off the Pebble in the morning, simply click it once. Please DO NOT use the LOCK/UNLOCK button as this is only to be used when traveling and can interrupt the Bluetooth signal.