Try to push all the electricity use you can into non-peak hours of the day. Though it is more complicated that this, that means do stuff at night. Charge your phone and laptop, run the dishwasher etc. when you go to bed.  Easing the burden on the electrical grid during peak times means utilities don't have to buy as much dirty power.

The L.A. Department of Water and Power has this handy list of tips for how you can be more energy efficient in your actions.

Edison has a better one here.