This year at CppCon, I'm doing a one-day pre-conference workshop. It's not just me, it's Andrei Alexandrescu, me, and Scott Meyers (everything at CppCon is alphabetical by first name, although for this particular triad we come out in the same order alphabetical by last name.) It's called Engage, Entertain, Educate: Technical Speaking that Works and that's what it's about. Because we're holding it the day before a conference, we're focusing on things you do when you actually get to the room and deliver your talk -- not on things like choosing a topic or writing an abstract. It's not a C++ workshop, though given who we are and who comes to CppCon, some C++ things are likely to be said from time to time. The focus is on technical speaking.
You will get a chance (three chances actually) to deliver a fragment of a presentation and get feedback. You'll also see other attendees doing the same - their feedback is likely to be relevant to you - and watch some talks from us (and some of our colleagues) along with some meta talk about why we did it like that.
So, when you register for CppCon, please consider attending our workshop, and booking your plane tickets accordingly. It's going to be fantastic.