Before we get to taking photos at night, it is really helpful to start to understand light and the effects that it will have on your images. Take for example, the sun at different times of the day. In the middle of the day the sunlight is very harsh and the colours in your photos will be quite different from early in the morning or in the late afternoon where there can be a deep richness in those images. Take for example the following two photos. The first was shot in the middle of the day and the second was shot as the sun was starting to set. Both photos are straight out of the camera with no post processing and you can see just how different the light was and its impact on the images.
Here are two images of distant ranges, again one is taken in the middle of the day and the other is taken at sunset. Note the sharp differences in the colours of the mountains.
Sunset and immediately after offer a time where some extraordinary colours can be seen in the sky. It is a great time for taking silhouettes too.