Bryan (and all the others...) gave good advice, I just thought I'd throw in my two cents as someone who had a completely traumatic first time yet did it again.
My best advice is get help. Experienced or otherwise it helps to have more hands and another perspective (but obviously experienced help would be ideal).
Also, make sure you have the feet secured well and a cone is a good idea, as one of the most traumatic things that happened to me both the first and second time was that the chicken dislocated a wing, which popped through the skin... The first time I didn't have the feet secured well enough, and the second time my "cone" was too big (I used a burlap sack, I need to use something tighter).
However, no matter how traumatic it is I will still raise my own meat. The only other feasible option is to become a vegetarian (and I really truly don't believe that is a healthy way to eat, otherwise I'd be all about it...), because there is no way I can justify eating industrial chicken, which lives and dies under exponentially worse conditions than I could ever expose my chickens to, because I can't stomach doing the job myself. I'm super attached to my roosters (my first kills were cornish cross broilers, which was a good start for me because I wasn't at all attached to them)- it's harder with them because they are usually more friendly and have more entertaining personalities- but I know that sooner than later they will be coq au vin. Because rooster fertility begins to decline after 3 or 4 years, I believe, and no matter how much I enjoy my chickens I don't have the space or resources to become a chicken retirement home. Like every member of my household, from the kids to the dogs, the chickens have a job.
ANYWAY... I have a question for the original poster. I want to know how they all tasted comparatively. I really want to start a somewhat self sustaining flock, so I'm trying to find a good balanced breed. Pretty sure I'm going to start with Buckeyes, because they made my short list and there is a breeder nearby, but I am still interested in other breeds- who knows, maybe the Buckeyes won't work out for me.