RE: shooting under stress practice
I don't know if others can do this? But let me tell you what I have done during self-defense training. It is not something I have heard others explain but is probably worth a try for you guys.
While staring at the target I mentally reflect on times when my life was threatened (there have been several). I put myself into that mindset. It takes a while to build up but is obtainable. I recall what it felt like to know I may be taking my last breath. The sudden fear, the helplessness, the adrenaline rush, the horror of someone wanting to kill you, the reluctance to kill them... It all adds up and when I feel it is real enough I unleash on the target which embodies those feelings for me.
Makes for a very interesting exercise in shooting and when I am done I feel that I have really accomplished something useful.