My trigger was when I got one of [these](http://i.imgur.com/dzYOysF.jpg), and finding that my incandescent bulbs were running over 200°F, while the LEDs were only about 80°F.  As I live in Florida, and most of my AC bill is sucked up by cooling off the house, it became a no brainer.      
       
I think the oven is the only bulb I have that is still incandescent.     
       
If you have some of the old-timey dimmer switches, you'll probably have to replace those too.