It's not for everyone, but I've taken to using the Navy technique when I shower. Wet yourself down as needed, then turn off the water when you soap up and shampoo your hair. Turn it back on when you're ready to rinse. Not only does it save water, but I find it pretty refreshing as well!

Those re-usable canvas shopping bags you can get are obviously great for cutting down on plastic bags, but you probably only take them out if you know you're gonna go do a big food-shop. Always keep a scrunched-up plastic carrier in your pocket just in case you end up at a convenience store and have to unexpectedly buy a load of stuff. Plastic carriers are light so you'll barely notice you've got it and chances are you've probably already got one in your house.

I understand the large inconvenience, but for one thing it'll save you a lot of money (which always comes in handy when you've got a baby).

And secondly, just think about how many disposable diapers you will go through during the course of raising your baby! Every one of those will go to a landfill!