Remove all ammunition from the magazine and chamber (or cylinder if using a revolver) and put it in another room. Double-check to make sure your gun is completely empty.
Aim at a safe backstop.
Develop a sight picture on a part of your safe backstop, and focus on the front sight.
Practice pressing the trigger. Depending on your gun model, you may need to "reset" the trigger by partially racking the slide or cocking the hammer. Complete a trigger press slowly and smoothly without moving the sights at all.
Repeat 10 or 20 times.