I always carry a small compass in my camera bag to help judge where the sun will rise/set when out on location. A fantastic free download that works with Google Maps now means that I can plan shoots in advance, from the comfort of home! Tap in a place name or postcode and The Photographers Ephemeris will show you how light falls on the land for any given date and time. It also available as a mobile App for iPhone and Android, perfect for outdoor photographers preparing that next landscape or urban shoot.
The Bridge of Sighs in Oxford (also known as Hertford Bridge) is much photographed but often in shade. Using The Photographers Ephemeris, I was able to see that the bridge and Sheldonian Theatre would both be illuminated by the light of early morning, shortly after sunrise. Happily this meant the buildings were beautifully lit and streets peacefully quiet. It also gave me an excuse for a second breakfast of pain au chocolat when the shops opened!