To save energy, don't leave cell phones and laptops charging once they are already charged. Turn off the power on surge protectors for computers if you can (if it doesn't mess up the internet connection).
Hang up clothes on a clothesline or on drying racks in the winter instead of putting them in the dryer. This is a bit of a pain, but it saves a lot of energy. Drying racks are pretty cheap.
Recycle everything you can. You can recycle plastic bags at grocery stores like stop and shop.
Start a compost pile. This pretty much eliminated all of our trash, now we just have a grocery bag full every week which we put in our neighbor's bin. Compost is also good because you don't have to buy fertilizers which could be harmful to the environment. There's lots of information online about how to start a compost bin and what to put in it.
Don't use pesticides on your lawn. Don't water your lawn too much or only water it in the afternoon so that the water doesn't evaporate before it gets to the roots.
Try to use cloth tote bags instead of plastic shopping bags or just reuse plastic shopping bags. Bring drinks from home in reusable containers instead of buying bottles from a vending machine. Don't reuse plastic bottles, though, because they leech chemicals into the water after a while.
Reduce the amount of meat you eat or become vegetarian! It takes a lot more resources to raise an animal for slaughter than to harvest plants for the same amount of food. To raise an animal, you have to harvest plants for the animal to eat, transport the food to the factory farm, feed the animal for years, then transport the meat to you. To eat plants, you only have to transport plants directly to you. Also, 90% of the energy of food is lost as you move up each step of the energy pyramid: http://www.eduweb.com/portfolio/earthsystems/food/images/energy_pyramid.gif
Vegetarian diets are healthier, too, and you're not killing animals unnecessarily.
This is what my family did. I hope you can do some of these things! Sorry for the rant about vegetarianism.
