The best way to achieve that is to fly at the speed which gives you the lowest vertical speed.
Personally I think that is too broad a statement. Often times ( in my experience most times) the best way to avoid hitting the ground is to ensure control of the aircraft is maintained. The best way to achieve that is to descend at current speed initially. The purpose of that is to avoid the situation where the aircraft is decelerating towards the back side of the drag curve with bells and whistles blaring during the 'startle factor' phase. I realise there will be many and varied opinions on the above and that it is probably a case of 'each to their own'.
The above assumes no traffic on TCAS.