Some new(ish) tips for saving on utilities

I just learned some of these tonight (and remembered some of these) and I wanted to share:

To save on power:
unplug everything. If you aren't using it, unplug it.
You could in theory unplug your fridge and/or freezer at night too. As long as it is shut, it'll stay cold.
I was given and idea about putting motion sensors on your freezers and I'm going to be further investigating that...

To save on your wash:
Use cold water all the time
Dawn gets out the worst stains
Use half of the amount of detergent you are told to use (and the same goes for dishwashing soap).
Also, clean your lint trap! Wash it and everything!

Any other ideas?