interactive tracker (it'll track via your IP address) linked to your Lat/Long
in case you want to know where the ISS (and several other satellites) are currently positioned
the map also indicates when the ISS may be visible to you
watch a "walk through" guided by Astronaut Scott Kelly here
(mock up at Kennedy Space center)
Incredibly, it "flies" at an average of 17,500 mph (15207 kts) traveling around the Earth every 90 minutes. My window of opportunity to spot it is about 5 mins long from a stationary spot. Night flying airline pilots are likely have the best siting advantage. I read that the ISS' daily track is a comparable distance as that to the moon and back.
From the ISS one would see a sunrise/set every 90 minutes (16 times per every 24 hour cycle) and there are several gorgeous images documenting that in the various galleries. This image seems very similar to one I have seen which was take from an airliner at approx. 37000". The ISS orbits at 249 miles above the surface (5280 feet in a mile, so -> 1314720 feet. I walk around 5 miles a day and still can't truly visualize a mile without "seeing" the AUO runway during approach. I scale 249 miles as a three hour drive - pretty good distance from here to there!
I especially enjoy seeing the "weather" images shared by the ISS crews.
very cool photo galleries made available by Space Center Houston
Kevork Djansezian/Getty Images
... final destination, the California Science Center in South Los Angeles.
~via The Altantic Space Shuttle Endeavor's final journey