For sn, here's a really good post: https://sanctioned-suicide.net/threads/stans-guide-to-sn.27535/
Personally, I prefer eb, but it's always down to personal preference and /or what you're able to get. Here's the eb megathread: https://sanctioned-suicide.net/threads/exit-bag-and-inert-gas-megathread.8393/ If you go this route, I highly recommend you read threads and posts by fightingsioux.
As for other methods, I'm not familiar with them myself. I would choose N but it's impossible for me to get hold of.
What I will say is don't rush. Take your time, do your research and then quieten your mind somewhat, if you can. Doing anything in a rush will probably result in a failed attempt.