1. Plant a Tree
  2. Use alternatives to chemical pesticides
  3. Start Composting
  4. Lower the temperature of your hot water heater to 120 degrees Farenheit
  5. Stamp Out Styrofoam , don’t use it
  6. Buy dolphin safe tuna
  7. Avoid tropical hardwoods
  8. Adjust toilet to reduce water use
  9. Insulate homes properly to minimize energy waste
  10. Support environmental organizations

info from http://everything2.com/title/50+Simple+Things+You+Can+Do+to+Save+the+Earth