Compared to all my friends, I am a little over the top, though I admit that I only do the things I can do that are easy.
I am a recycling maniac. I recycle everything that can be recycled. I often wonder why other people are not as strict about it as I am. I even have an extra blue bin because I frequently fill one up. (Yeah, I know...a real waste, but if I don't leave stuff completely inside the bin, they won't take it. Been there, done that.)
I'm always walking around the house turning lights off. As much as I tell my wife and kids, they forget sometimes. It doesn't bother me that much, I just flip the switch off and go on with my day, but I wonder what it will take to get the message across. I just replaced one of our toilets with a new, low flow one. It uses about 1/3 of the water, it's a much faster and quiter flush, and we've never had to do a 'double' flush cause it didn't clean the water. That alone is a huge saver of water. Where I live, we sometimes have water restrictions. I also swapped out my pressure cleaning strength Speakman shower head with a reduced flow model. It's actually delivers an excellent shower with about 1/3 of the water. I've been telling anyone who will listen that the way to get people to conserve water is to jack up the price and charge by the gallon. Let people choose between wasting water and energy and something optional like dining out or taking a vacation, I say!
I usually save vegetable scraps from my kitchen and throw it into a plastic composting bin I have behind my house. I throw overripe fruit in there, stale bread, watermelon rinds, coffee grinds (with filter). As much as I add to the bin, the level always stays the same. I don't turn it or do anything like that. My thinking is that it's slowing filling up a landfill, and it sure costs alot less to transport that stuff to the dump.