I’m talking about adjusting your clock — your body clock, specifically.
Where I’m based, in Singapore, we get at least 10 hours of sunlight every day of the year. With so much natural light, we can aim to do more in daylight and forgo the use of electric lights at night. After all, those things don’t power themselves.
It's pretty logical if you think about it: when staying up at night, we’ll need to keep the lights, and other electrical appliances, on.
Already, an average household in Singapore uses 732 kWh per month -- that's equivalent to using 61 iPads for a year, if charged every other day.
Tip no. 1
FOLLOW THE LIGHT
Use Siri or Apple's Weather app to determine the sunrise and sunset, and plan activities around those. You can set your morning alarm manually, or...
Tip no. 2
Use the 'Bedtime' function in Apple's Clock app to set a regular rise-and-sleep schedule. The app pings me half an hour before I am scheduled to go to bed (so I can start getting ready), and at the end of a month, it gives me data from which I can derive sleep patterns. It seems I go to bed later in the middle of the week...