Photographing the Aurora

There's been a lot of aurora activity lately so I though some tips on how to get the best photos of it would be helpful. Here's an article on dpreview http://www.dpreview.com/articles/8217618174/auroral-photography-a-guide-to-capturing-the-northern-lights . Some of the key points from this article were:
Know your subject, when it's likely to appear and what it should look like.
Timing is everything, websites dedicated to aurora storms are helpful to know when a storm will go off
Location, generally the best places to view the aurora is in cold northern climates
Gear up, make sure you have all the necessary equipment a camera with quality high ISO, wide angle lens, tripod, remote shutter, and don't forget your memory card like I have in the past
Prepare for the cold, don't expect to be taking pictures of the aurora in your shorts
Master your camera, no filters on your lens, shoot in RAW, highest ISO your camera is good in, use infinity point, expose for about 20 seconds
Prepare to wait, storms may only last a few minutes so be ready to wait out until you get your shot
Practice makes perfect, don't quit because you failed the first time keep at it until you get something you're proud of, it's worth it
Here are some examples of aurora pictures