In reply to Denni:
This is a great website for satellite-spotting:
http://heavens-above.com/
I enjoy going out to see iridium flares, which can be really spectacular. If you've never seen one then I would definitely recommend putting your location into heavens-above and finding a bright one. There are a few near me at magnitude -8.5 coming up this week.
For comparison, the ISS reaches about magnitude -3, so the iridium flares are about 100x brighter.