Travel less and travel more carbon footprint friendly:
Car share to work, or for the kids school run
Use the bus or a train rather than your car
For short journeys either walk or cycle
Try to reduce the number of flights you take
See if your employer will allow you to work from home one day a week
Next time you replace your car - check out diesel engines. With one of these you can even make your own Biodiesel fuel. Find out more about Biodiesel.
When staying in a hotel - turn the lights and air-conditioning off when you leave your hotel room, and ask for your room towels to be washed every other day, rather than every day