The best way would be to get China on board with meaningful sanctions. NK can live without us and the rest of the world, but they can't live without what they get from China. The problem is that China, while not liking what NK is up to, isn't really willing to cut the cord.
Without China we have to start calling NK's continuous blustering bluffs. That might include shooting down that missile when they launch. There are problems with that too, to include where that missile might fall after we shoot it down.
It's a conundrum.
"A man never drinks anything that a plant lives in" --DBone (A Real Man).
http://vimeo.com/4938173