This is a great list. As someone who has spoken at hundreds of conferences, there's one piece of advise I give younger speakers, particularly those nervous about how the audience will receive them. Dylan alludes to this in a different context
Finally: respect your audience. Whether you’re talking to five people at a meetup, fifty at a community event, or five thousand at a huge international conference: those people are the reason you get to do this. They have given up their time - and often a substantial amount of money - to hear what you have to say. They deserve your best shot, every time
This is the same thing I say except, them _choosing_ to attend your talk, and opting in to giving you their time and attention is a signal that they _want_ you to succeed. They are HOPING you deliver your message, and that your demos all work, and that you conclude well. If kept in mind, I believe this can help alleviate some of the anxiety.
Sidebar: I've done this for a very long time and I still get nervous at the beginning of every talk. And I will be the first to admit—you WILL run into the occasional show off in the audience who is intent on demonstrating to you (and to the rest of room) how much smarter or more experienced they are than the speaker. That will happen—but it's an aberration.