Production:
Email rather than print
Use FTP for your file exchange
Use a USB key/Ipod instead of CD’s to carry your files
Use webcam/videoconferencing (or skyping) instead of flying
Transportation:
Let the train take the strain!
Shooting:
Manage your waste on a film set (leave no trace: bring back with you what you can’t recycle on location, no disposable plates or cups when possible, etc.)
Office:
Shut your computer every day, it doesn’t harm it at all, and the energy saved at a large scale will be of a great impact (no, a screen saver is not an energy saver)
Use energy efficient lighting (compact fluorescent light bulb (CFL) last four times longer but use 25 % of the energy)