If you are looking for a few ways to make a difference, and start to address your carbon footprint, check out these as cheap and effective stocking stuffers for friends and family.

Compact Flourescent Lightbulbs - they may cost a little more than a traditional light bulb, but forget about chaning them for a long time (meaning years) and you can see the savings in your electric bill every month.

 
Energy saving thermostat for your home - replace the thermostat that has been around as long as your house with one you can program. Think of it this way...you aren't home during the day so why keep the heat cranked up? Why roast at night when you are warm in bed? Set the thermostat to warm up when you get up, turn down while you are gone, warm up as you get home from work, and cool off for a good nights sleep. Your wallet will thank you and the planet might last a few mintues longer as a result.
 

Great ideas.  Where are the best deals for the bulbs?

Most home improvement stores run promotions regularly for bulbs. Much cheaper than the grocery store or local convenience stores. Things like a 6 pack at Home Depot for $9.99.

Also check out costco - they often have 10-12 packs of bulbs for $1 or so a bulb - sometimes cheaper.