Turn the lights off when you leave the room. It is a myth that they use more energy to start back up – a fluorescent light bulb left on for 15 mins uses 500 times more energy than it would if switched off when not needed. And don’t forget about energy saving light bulbs!
Get on your bike! Get a bike and practise at weekends or on quiet roads before using it for work. Don’t forget the helmet and the lock!