I've gone eco-friendly & organic for purely selfish reasons -- I have allergies to sulfites, soy, and corn derivatives.
I've had great success with just using baking soda to clean with -- especially my fruits & veggies. I also use the Seventh Generation cleaning products.
Plastic & paper bags are a "no-no" so I carry my canvas bags and washable insulated bags with me everywhere. I found some fun bags at Wal-mart recently that are sort of a t-shirt material made out of organic cotton. I'm going to use one to carry my knitting around & the other for the beach because it's washable.
I am starting to use storage containers more, instead of zippered plastic bags & use a Pur filter pitcher for cooking. I still have to buy bottled water, because the city water is treated with corn derived products & buy bigger bottles to pour into my travel cups (the bottles have deposits when purchased & can be returned for $).
Feminine hygene products are almost all exposed to corn (corn starch dusted, fragrance, or the adhesive is corn derived), so my new best friend is a Diva
cup. Love this because I have heavy periods and don't have to worry about leakage.
I use more dish towels instead of paper towels, have cut back on using one time use cups (take out at Starbucks -- but am going to invest in one of their insulated iced coffee cups), don't use paper plates, and only do full loads of laundry in cold water.
That's all I can think of.