DRYFIRE PRACTICE
First at home & not in the same room where there is any live ammo. Keep your dominant eye focused on the front sight thru the trigger "breaking". Follow thru & keep it as steady as possible.
Then begin your live fire session w/dry firing, again keeping watch on whether your front sight is staying steady. Shoot for a while, until you see your groups opening up. Take a break, then return to dry firing until the front sight steadies down.
After a while, you'll find you've established a habit of following thru the shot.
Good Luck, Hank M.