After noticing some erratic, corkscrew flight with one of my board bows, I switched from gripping the bow near the heel of my palm to further out on my thumb to get more clearance from the string. I don't know if my terminology is correct but when I say the heel of my palm, the pressure point is basically the same as where it is when I execute a palm strike in martial arts -- bone contact. The changed grip was almost like making a puppet hand and having the handle rest against the base of my thumb. The difference in flight was outstanding. Straight arrows, all the way to the target. It's almost the same way I grip a recurve (like pictures I've seen of GF Asbell) but not quite the same. for some of you who shoot selfbows, how do you grip the bow to keep the string off your arm?