The mane messages are to not give up and you will never make something perfect first try. Also that most small ideas have the biggest impacts. Justice is not made by killing its good ideas.
The way that he wanted to get his message across to a audience was to TED. He wanted to make a difference in people killing when thee is small invention that are easy to make that will make as much difference as killing with no animals being harmed.
He had a Lepel microphone to make his voice louder so everyone could here him clearly. He also had a clicker so he could change the slides easily and on time to improve his message.
The techniques he used well were eye contact so then he could always tell where his audience is looking. He also added humour to his script so the audience was always engaged. He also made sure that you where paying attention.