Since we're talking about something I've done, I'll pipe up. I have read several of the threads about processing on the meat birds forum. Most everyone admits to NOT enjoying the killing part. Everything else is downhill as far as I'm concerned.
My biggest fear is causing unneeded pain. Haven't tried pithing (blade through the brain) and don't think I could. I have tried several times slitting the jugular. I think it takes too long, probably because I have yet to hit it perfectly the first try. I may just have to get a good hatchet as the old fella at the feed and seed recommended. After the "deed" is done, I have no problems with the rest of the processing. I apparently either need pointers on plucking or turn to skinning.
If you can manage calm and detached, talk to the bird as you get ready. Sometimes I even pray out loud. I thank God and the bird for feeding my family. Anyway, that's what I do here. It's worked for me for almost a year now. June last year was the first processing and I've lost count of the number I've processed since then.