I am reading Joel DiBartolo's Serious Electric Bass Book and the technique he says to use is this. Always keep your fingers down in playing postion on the fretboard. for instance in the first position near the headstock if you are fretting a G# on the E string with your pinkie you should hold down all your other fingers on the frets behind the pinkie so index finger on F, middle finger on F# and ring finger on G while you are holding the G# withth e pinkie. I find this a little uncomfortable and I have to turn my wrist quite sharp to do this. It's not a problem higher up the fretboard. Does anyone here use this technique?