Some ideas (Score 1)

Some ideas, many of which probably have been mentioned in various posts already:

• "Dark Sky Lighting" or similar - supposedly designed to minimize light spilling all over the place - http://www.seagulllighting.com/Dark-Sky-Qualified-Lighting.htm
• Motion-sensor lights + reduced wattage bulbs - reduce how long an outdoor light stays on and how bright it is
• Mr. Beams (http://www.mrbeams.com/) has a collection of battery-powered outdoor spotlights and accent/path lighting, useful if you can't or don't want to run electrical wires. Downside of course is you have to change the batteries every so often, depending on use.

Hope this helps!