A couple of tips:
- Avoid the full moon, it's not worth doing it unless the Aurora is strong and you're in Iceland or something [5]
- Watch the NOAA satellites [2,6]
- Under moderate light pollution a CLS or UHC filter can help, they make clip-on ones for Canon and Nikon [3,4]. Although nothing beats dark skies.
[1]: https://www.flickr.com/photos/joelkuiper/albums/721576649734...
[2]: https://twitter.com/JoelKuiper/lists/aurora
[3]: http://www.astronomik.com/en/filter-gegen-lichtverschmtzung-...
[4]: https://www.cyclopsoptics.com/filters/stc-astro-multispectra...
[5]: https://secure.flickr.com/photos/joelkuiper/24662326646/in/a...