Ignoring cars and PV one can invest in a home storage battery and switch to a time of use tariff and then charge up when cheaper rate and discharge when at the higher rate, obviously joining it to solar PV is more beneficial, additionally you can join something like Ripple Energy invest in one of their windfarms and get a payback on your investment into your household energy account over 25 years (I know I know some of use won't last that long but you can leave the investment to someone when you pass).
There are things you can do to alleviate spiraling energy costs if you pull your head out of the sand.
Just as long as you aren't a nurse earning 30k.....
