If I were going to utilize this method, I might do several, maybe dozens, of "dry runs", whereby I'd stick an unloaded shotgun in my mouth and get comfortable squeezing the trigger. When I wasn't doing dry runs, I'd imagine myself utilizing this method and all of the steps involved, like loading a shell into the gun, picking up the gun, slowly moving it towards my mouth, inserting the barrel into my mouth, thinking about last thoughts I'd like to think about, moving my hand nearer to the trigger, placing my finger on the trigger, and finally squeezing the trigger. I'd play the entire scenario out over and over in my mind. I'd do all of this to the point where it would become second nature to me. Then I'd wait until my life went further down the shit hole to the point that every single bit of hope that still resided in me was completely gone. Then I'd go through with the "wet" run. But, that's just me.