Hello, i've failed everything in my life and even at a lower degree, every choice i made was the wrong one. Everything i did was doomed tot fail even for stupid reasons. Even little things that people would consider "normal" oddly failed in my case. Same goes for suicide. How can i make sure i succeed? I don't want to even fail another attempt.
I have chosen the exit bag route. Painless and relatively failure free. I think the key will be accepting it at the time and welcoming the sleep, once passed the first few seconds you should be unconscious anyway.
So you only need to fight any survival instinct for a few shorts seconds.
I feel all other methods are much more open to failure as alot of them allow for too much time for your survival instinct to take over.
I remember when I was younger I tried to hang myself. I was almost at the point of unconsciousness, when I heard my baby son crying in his cot and that awoke my survival instinct. So much in fact I was able to lift my own body weight by pulling open the noose and slipping out.
Showed me that the human will to survive is extremely powerful.
This of course can overriden to some extent. Which is why I feel the exit bag is sound solution as I feel you can easily stay calm enough for a few seconds just long enough to pass out and slip away peacefully.