The more I learn about hypnosis the more often I run into people saying that what I do can't be done. It really is kind of like that Neil Gaiman quote, "If you don't know it's impossible, it's easier to do."
My offer to critique you still stands.
Here's how I did it. First, I've been learning along with my buddy. We studied most of the same resources. We also studied for nearly a year before trying anything. He ended up throwing a party and putting a couple people under at that, while I was at Burning Man. So when I got back, he came over and was talking to me about it. My roommate was interested, so my friend put him under, and did some phenomenon. Then he brought my roommate out, and we took a little break. Then I went through the entire process as if he hadn't just been hypnotized. This gave me a chance to try it knowing that it would work because he was essentially still hypnotized.
The next time, my friend hypnotized one person, and I hypnotized someone else, using him as social proof that it would work on the other person.
After that I had the confidence to just put people under myself.
Confidence is extremely important. Speaking clearly is also important. Rushing your words, or seeming nervous, or picking the wrong subject - any of those can sink you before you begin. Wording is also extremely important. The wrong wording knocks people out of it before you can get going. I don't claim to be an expert, but I have had a lot of success with my method of hypnosis so I'm willing to help.