I have had trouble pulling shots for the last couple of years. I would search on line, find something, and say, "that's it," only to revert back to pulling when on the course. I know that I stop my turn sometimes, ("back to target" per Golfguru above), but I could never seem to stop the pulls for any length of time until this spring when I found this:
Pulling Shots Left - Bob Mann Answers
This worked for me ... I haven't had problems with pulling since. I don't understand how I got into the habit of locking my left leg but now I make sure both knees are flexed throughout my swing. Now if I can just stop overswinging ...
This may or may not be your problem. There are so many things we find to do wrong???