Last year's "It-Girl" Shailene Woodley makes her own cheese, toothpaste, body lotions, face oils, medicine, and gets all of her water from fresh mountain springs every month. No word on how much energy is spent on each of those mountain excursions.
You can cut down on your water consumption by showering with a "friend" like Grammy Award-winning rapper and Fast & Furious supporting player, Ludacris.
Former Victoria Secret model and current professional narcissist Tyra Banks contributed to a book full of everyday environmental tips, The Green Book: The Everyday Guide to Saving the Planet, along with a slew of other self-important celebrities like Ellen DeGeneres, Jennifer Aniston, and Tiki Barber (which certainly dates the book since it's been a while since he was relevant), among others.
Cate Blanchett controversially appeared in a commercial in her native Australia (free of charge) actually promoting a carbon tax to help cut down the use of polluting fossil fuels.
Aside from being one of the greatest human beings ever (for punching Justin Bieber), Orlando Bloom also founded the Global Cool Foundation (globalcoolfoundation.org), a non-profit whose goal is to help reduce greenhouse gas emissions, utilizing educational initiatives to reduce overall energy use.
If you have the finances to do so, you could be like Leonardo DiCaprio and drive super expensive electric cars. In between bedding the entire Victoria's Secret catalog and getting snubbed repeatedly at the Academy Awards, he also found time to produce and narrate the 2007 documentary The 11th Hour, which proposes potential solutions to many of the environmental issues facing the planet (like climate change, deforestation, mass species extinction, etc.).
Those are just a few of the celebrities you can try to emulate and model your life on. Or you could always just do your own thing...