Well, I haven't tried to ctb, yet, as I'm not quite ready. I still have things I need to take care of. But, what I do on a regular basis is visualize my method and the steps I will be taking one by one, so that, hopefully, when the time comes, everything will be sort of automatic for me, if you know what I mean. My method is CO, barring some miracle of getting N.
So, I imagine myself erecting my tent, sealing all the seams, placing firebrick inside to place the buckets of coal on, opening the bags of charcoal, dumping charcoal into chimney starters, lighting the charcoal, waiting a period of time, dumping the hot charcoals from the chimney starters into the buckets, placing the buckets onto the firebrick in the tent, closing the tent, waiting another period of time, measuring the CO level with my meter, quickly getting into the tent when the CO level is high enough, closing the entrance and sealing it as fast as I can, lying down onto the pad I have placed on the floor of the tent, closing my eyes, and then not waking up.
I go through this scenario every day, so, like I said, when the time comes, it will all be second nature with no anxiety.