http://www.youtube.com/watch?v=Soba0sGGML8&NR=1
see zach johnson's swing
note short backswing and strong grip on backswing. note how long right arm stays straight in follow through.
visualize plane you want as well as line.
rotate hard without hesitation.

grip in fingers of left hand/tour striker
minimize opening of club on backswing.
http://www.tourstriker.com/videos.aspx