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
There are many ways to play chips shots around the green; select the shot that is most appropriate for your skill level to lower your scores consistently