Watching how the light changed from moment to moment, and then that exact moment that a low light situation becomes a night shooting situation was exciting. Neons got brighter, shadows became defining and the camera becomes a different tool to record it all.
A few tips:
1 - Wear walking shoes
2 - Be patient and wait for the light you want
3 - Use your ISO, this is what it is made for
4 - Bring friends and be aware of your surroundings
5 - Backpack camera bags are a great choice
6 - A wider DOF (depth of field) will give you a super crisp shot
7 - Expose for the bright lights, and your shadows be richer
8 - Keep your eyes open and remember to look up, especially if you are in an area with large buildings.
9 - Experiment and HAVE FUN!