I'm with Chris. I've already cut back personal car use to minimum (primarily through working from home but I didn't use my car in my previous job either).
I try to avoid having lights on unnecessarily, all the bulbs that can be are low energy use, at night I read by candlelight instead of electric (I find it better for my eyes anyway) and, oh, I remember, I'm a vegetarian, thus my carbon footprint is significantly reduced anyway.
I work for a political party that has environmental causes as a central part of its platform, and do the best I can.
I ignored Earth Hour, pointless tokenism that does very little--although, to be fair, making people realise there are better (cheaper) options than perpetual lightbulb use is probably a good thing.
Invictus is right, if he's prepared to pay for it, he should be free to do what he wants. Unfortunately due to the biased economy, he's not paying the full cost, hence pigouvian taxes on externalities should be applied in order to reduce taxes on less damaging or beneficial activities.
Put the tax system right, and then let the market sort it out, companies will innovate and invest if there's a benefit to doing so.