Here's a bandwagon worth jumping on: use canvas bags for shopping trips. Sure, Whole Foods doesn't use plastic bags anymore, but why not take the initiative and skip the paper bags too?! Not only do reusable bags save the environment, they also make lugging your groceries around easier (plus, they're inexpensive!) A tip: leave a couple in your car so you won't forget. I admittedly do a bad job of using these guys for other types of shopping - one of my goals is to bring 'em on other errands as well.