Today was about using as little energy as possible.
We do this in many small ways already, so it wasn't a massive change for us.
We turn off lights when not in use, use the quick wash on the washer and dishwasher. We dry our clothes on the line, we don't use a hairdryer to dry our hair.
I have a little tip though that we started doing this week though. Boil a kettle full of water when you make your morning cuppa and then put the boiling water that is left into a flask. Ours stays steaming hot for hours and when you drink as much tea as we do it's great to save a little energy...and not have to wait for the kettle to boil each time