The last training class I took was a four day with Steve Anderson (Grand Master USPSA) and he stressed acquiring the sight picture before letting the shot go. In his opinion acquiring the sight picture should be "muscle memory" before trying to go fast. He also pushed "dry fire" exercises for performing the draw and sight acquisition/trigger pull as one movement, and magazine changes on the run. If you are serious about raising your level of performance with a pistol consider a class. There are lots of folk out there offering 2 and 4 day classes, look for some one with credentials that only offers a small class. Our class had sixteen folk in it, mostly made up of Military and Leos. Be prepared for the first two to four hours of the class to be devoted to basic gun handling skills with another hour devoted to holding the sight picture while completing the trigger pull.. Our particular class went through timed drills the second day and then again on the fourth day to check improvement.