Remember to keep it simple and be conservative in the rough, if there is a lot of grass between the ball and the club then use a higher lofted club
The most common reason for poor chip shots is the breakdown of the wrists during the swing, try the Tic-Tac swing aid which clicks whenever your wrists breaks during the swing
MARGARET PLATT-KLAUS shows you 2 drills using a bag and a board to help achieve a good impact position