Public Speaking- yikes!

Hi Brooke- So the self confidence challenge continues. I loved it and am still trying to do it and ‘dare’ myself on a regular basis. I am a life coach and when a friend mentioned he was looking for a speaker for an event we talked about it and I volunteered. I have given presentations to executives before at work (power point slides). I have taught CPR and other various medical topics to hundreds of people. I know the material I want to present. My question is… thinking you have lots of experience… how would you recommend preparing? The presentation is 60 minutes, some of which I am hoping to make interactive. Thanks!