I feel that it is better to understand the reasons why you choose certain setting, rather than try to remember that night scenery = low iso + tripod + ______ and so on.
For landscapes, I would go to the base ISO setting (on my D90 it is ISO200, on some cameras it might be ISO100) and make sure the support (eg tripod) is very stable. Reason for using base ISO is to have the maximum dynamic range being recorded, and minimize the amount of noise in the image.
Remote shutter release and mirror lock-up are additional steps that can be taken to minimize the risk of vibrations affecting image sharpness, so would turning off IS/VR/SSS when camera is mounted on tripod.