To me being Green is about recycling and reusing things you already have and conserving energy whenever possible.
I have purchased some energy efficient light bulbs and am using them to replace the old bulbs as they burn out. (I'm caught between going green and saving green right now). We also purchased an HE washing machine and dryer when we bought our house. We have a programmable thermostat and keep a/c temperature higher during the day when we're not home, so we are not cooling an empty house. I've also started turning on only the light in the room I'm in, turning it off as I leave the room, and opening the blinds during the day. (You must know, I have always been someone who turned on every light in the house because I was going to go back "in there".)
My latest "green" idea came for someone else's blog (sorry, I can't remember who). The question was asked about what people were doing with all of the plastic shopping bags you get from CVSing, etc. Someone wrote that they use them for their "smelly" garbage. Well, I had so many of them and nowhere to recycle them, I decided to start using them all the time. I even found a garbage can at Target specifically for those types of bags.
I usually only have to take one trip out to the "big" can a day.
Not only am I recycling the bags (being green), but I'm also saving money by not spending money on trash bags (saving green).