I use the same techniques as folks would with colour transparencies - I use ND Grads for most shots other than macro. My Lee ND Grads get a lot of use, particularly the 0.9 (3 stop)....
I usually spot meter for midtones and use the ND Grads to hold detail in the sky. I also often use Grads in combination with a yellow filter to boost contrast a little.
I've used the same film for a long time (Ilford Delta 100, rated at 64) and have learned to judge how it handles most lighting situations.
As I don't post-process with scans, I need to get things right 'in-camera', and have had many 'didn't-quite-get-things-right' rolls of film to learn from...!