*DING*Practice more.
A while back I took Suarez Int'l's point shooting gunfighting skills class. It wasn't until the second half of day 2 that things started to come together. By then, indexing was a snap and several of us were flat out amazed at the sort of accuracy we were capable of w/o sights (which had been taped over since early day 1). I really need to follow up with their second course in that series. Very eye opening.