Among the things they mention are the simple stuff, like CFLs (or simply turning off the lights) and hanging up your clothes to dry. My favorite part is the end:
People who are really hard up struggle to run a car, and minimize their journeys because they know how much it costs in petrol. They don't dream of flying all over the place, but maybe save up all year for one holiday with a budget airline or holiday in their home country. It's the well-to do who have the largest carbon footprints, and paying out some of their expendable income on a great big wind turbine for the side of their house may look green but it really isn't making much of an impact. So if you feel you can't afford to be green, you probably already are.
Save Money, Save the Planet