For me the most successful help came from forcing myself to shoot 100 rnds in DA only. I also tend in DA, and also as I try to pick up speed, to switch from a sight picture where the POI is on the top edge of the front sight (how my sights are adjusted), to the front dot covering the POI. The 'drive the dots' technique. It's a bit of a cheat but it works. I also, every range trip, force my self to shoot the last mag of ammo in DA. That is what worked for me for 15 yrs or so until more recently when I started shooting local competition. That is when I started using lighter hammer springs. Oh wow, what a difference. And then 6 weeks or so ago I installed a Langdon trigger job in a bag. Oh wow, another jump in DA shooting. I don't know the details about how it is done but what I notice is that the increase in pull weight over the travel of the trigger seems to be less. My trigger gauge says that is not true, but it feels like the effort increases for the first 50% of the stroke, and then stays the same for the last 50%. We currently use 12 or 13# springs in our EIIs for competition but I am going to slowly add TJIBs to our HD 92s and use 14# springs. One other thing I have been doing lately, is grip the crap out of the gun w/ my left (support) hand. This is kind of new for me so I have to remember to do it, but when I do, the feeling of the gun not moving while I pull the trigger is obvious.