Not very good at it, but I usually start by mimicing my opponent, making a zigzag barrier with my pawns, then strike with my diagonal movers.
Eh, mimicing the opponent isn't that good if you are Black. You gotta break that eventually or you'll lose. About the pawns, I had someone do that against me. I just traded off the main pieces then took care of that weak pawn formation with what I had left. And don't you mean Bishops?