Today at Costco we bought some compact fluorescent light bulbs.
Recently we've installed some dimmer switches in a couple of rooms (as well as two new bathroom fans complete with timers... LOVE the timers :-) We were looking forward to replacing our old light bulbs with the new CFLs, but apparently you can't use the type we bought with dimmer technology.
However you CAN use them in recessed fixtures, so they'll be going in our hallway. I can probably put the rest in various locations in the basement as well (we bought a package of ten).
Hopefully tomorrow I'll get them installed, and we can start saving more energy :-)