Day 3: reduce your carbon dioxide missions when you travel. Now this is a bit tricky, since I have no intention of going anywhere today that I would even consider getting do by any means other than by foot.
So, rather than that, I've decided to tackle the low pressure in my car tyres, which 'Save Cash and Save the Planet' reliably informs me increases petrol consumption and is therefore A Bad Thing. So I will go onto the Interweb and see what the pressure should be; I will not go and get it done, since that would be an unnecessary journey, but next time I'm using the car, I'll call into a garage and see if I can't find a helpful person to do it for me (what's that you say? - do it Myself? ha! you jest!).