I used to be crap with short bowling. I would try to hit them all the time and normally get out, then i tried to leave them which i did find i was missing alot of runs, as my reaction to get out of the way soon as possible. When a bowler with half a brain see's this, the normal thing to do is to keep it there.
With the help of one of our players/coach of past (Chris Gladwin), he set up a bowling machine and i had between 100-200 balls at a continually short pitch, with my backfoot tied to rope to i could only move back. I had this for about 3 weeks. I found with the help of the coach, the continuing short ball and the knowing it will be at a short pitch, i found my position in the right place. I know that knowing where the ball is going to pitch is a good advantage, but in a game situation where you can't tell the bowler where to pitch, i found it to be a great help as my position was perfect for me.
Another tip he gave me was to leave my position to the last possible minute due to my style of play.
So, the age old saying made true to me, practice practice practice.