You can re-use boxes for packing, and save money too. Grocery and liquor stores throw out tons of boxes every week. Ask the manager if you can come by and grab some for your move. They'll be happy to let you take them off their hands.
Use old newspapers or recycled paper to stuff boxes.
Some moving companies offer biodegradable packing peanuts. Use these instead of Styrofoam.
Use towels and old clothes to cushion breakable items.
Use baking soda as a cleaning product — it is natural and non-harmful to the environment. It can be used for a wide array of projects, from removing tough stains on laundry to scrubbing your refrigerator.
Seek out green cleaning products. Most grocery stores now carry a host of green products. Be sure to read the labels to find environmentally friendly products.
Pack your moving vehicle efficiently to save on trips and gas.