I have a Sekonic 398M Studio Deluxe and Minolta Spot F.
I prefer the separate meters for security if one is lossed/dropped/damaged/etc. and to double-check each other's calibration when an external calibration source isn't present. (Don't forget. Even if you can't check your meters' calibrations against an external reference, be sure they at least match each other.)
I'll start with the incident and flat disc receptor on the key light, confirm it with the spot meter and a grey card, continue lighting by eye, confirm a reading towards the camera with the dome receptor, continue lighting by eye, and finally, check my latitude with the spot meter.
There is a great article by Gerald Hirschfeld, A.S.C. about metering technique here:
http://www.sekonic.com/Cinematographer_booklet.pdf
Michael Morlan
http://michael-morlan.net