Did you know that probably the biggest energy saving change you can make is to cycle instead of using the car? Bicycles used for short distances are by far the most efficient means of transport and many cities such as Dublin have started to invest heavily in cycling infrastructure such as the canal side cycle way linking the north side of the city to the south side.
Not only will this save on energy and carbon emissions, but it will make a significant impact on savings for your wallet as well as your health (and that of others through reduced air pollution especially in urban areas). It is also one of the safest forms of transport for both the cyclist and pedestrians.
Try to remember and live by the motto, "two wheels good, four wheels bad!" and here's an interesting short video on how the Netherlands got its fantastic cycling network: