I use a equalateral triangular pick. It is a little larger than the usual picks and having 3 good pick points makes it easy to relax my hand when holding the pick, Even if it slips, it is easy to rotate up to one of the other exposed pick points. I also hold the end opposit from the pick point in the distal crease of my index finger. It rarely, if ever slips. It also is easy to change a pick point if one breaks while I am playing.