Funny you should mention this.  I recently read an article from a May 2008 issue of Working Mother magazine and saw a great list of suggestions ("The Reluctant Environmentalist", by Lisa Armstrong, p. 50.)  The coolest one was to put a load of clothes in the washer in the morning, let it soak in cold water all day.  When you get home from work (yes, I am a WOHM), put in the soap and run the laundry on the "light" setting (a full setting on my washer is 14", I have been running the pre-soaked clothes for 6" instead). 

Here are some of the little things we do:

- pay bills online; paperless.

- recycle glass & metal with our township; take paper to the box outside my kids' school.

- pack waste-free lunches.  I have multiple sets of Laptop Lunches and Fit n Fresh lunches that I put in our lunch bags.  We also have a bunch of Sigg bottles and KleenKantenes.

- keep our water heater at a lower temp, avoid running AC in summer and keep temp low during winter.

- make sure tires are properly inflated.

- dh carpools 2-3x week.

There are more little things... just can't think of them at the moment.  :)

I, too am starting to use cloth bags for grocery shopping and switching the light bulbs over to the CFL.  I've been making more of an effort to consolidate shopping trips to avoid running out for one item.  As much as possible I try not to throw useful items away.  I either try to sell them, offer them to friends and family or donate them to charity.  I've tried one or two items from the new line of green cleaners by Clorox and while they do a good job of picking up the grease and grime, I'm worried about germs.  I always have Clorox wipes or similar produts stashed in cabinets and am not convinced yet that there are any green products that disinfect and sanitize well.  Anyone who is more in the know than I am have any advice?

Truthfully, I think that the value of sanitizing and disinfecting is overstated.  Most things get plenty clean with just plain soap and hot water.  Tea Tree Oil, vinegar, and hydrogen peroxide are all natural disinfectants -- you can find tons of recipes online.