I like to spot meter the shadows, and assuming I want some detail, this is zone 3. Then I check the highlights, to see if they extend beyond zone 7. If all is well, I shoot at the indicated exposure. If the brightness range exceeds 5 stops, I bracket so I can pick my compromise when printing. In general, I am finding that a bit of underdevelopment and associated reduced contrast seems easier to correct with VC printing than working with negatives that have too much contrast. The 3 degree spot meter built into my Pentax 645N works well in most circumstances to support this technique.