Future Farmers of America, perhaps? I don't think they're a specifically environmentally oriented group, but they probably cover sustainable agriculture.
Stuff to do in your everyday life is just as important as the "bigger" actions such as protests, contacting officials, etc. Do your best to live your life in an environmentally friendly manner.
If you use hairspray, for instance, use the kind which is pumped manually rather than aerosol sprays.
Read the back of beauty products and preferentially buy ones which are not tested on animals.
Look for recycled products, or products which include recycled or recyclable materials.
Look for organic products, free-range eggs and/or meat, organic meats. Look for stores which will give you a greater variety of humane and environmental choices- this website might help:
http://www.certifiedhumane.com/ If there are no choices available to you, contact your local store managers and ask for them, and ask others to do the same. The managers probably would like to stock these sorts of things- really, people do like doing the right thing- but they can only feasibly supply these items if people are willing to buy them. So buy them, whenever possible!
Pick up trash in your area, look for recycling facilities and start sorting your own trash. If you get into a routine of taking your own trash out to the recycling facilities, it'll be easier to set out recycling bins in other areas and "harvest" them when you go on your routine recycling route.
Use light from outside as much as possible- try not to turn on lights when the sun's available. At night, turn off lights when you leave a room.
If possible, open a few windows and let the wind blow through your house rather than cranking up the air conditioner.^_^ Wear heavier clothing, and take advantage of the warmth from baking your dinner in the evening, rather than turning up the heat.
Get a few cloth bags and take those to the grocery store, rather than getting new plastic or paper bags every time you go shopping. If you do get plastic bags, then reuse them as trash bags (or recycling bags!) around your house. If you get paper bags, recycle them (you can also reuse them as cat toys, and recycle when kitty's bored with it^_~).
Walk or bicycle to nearby places more frequently, and/or use public transportation when available.
Those are good places to get started.^_^
