I also find this a useful resource when preparing a talk (slides-based): David Tong's "How to make sure your talk doesn't suck" www.damtp.cam.ac.uk/user/tong/t

I also find this a useful resource when preparing a talk (slides-based): David Tong's "How to make sure your talk doesn't suck" www.damtp.cam.ac.uk/user/tong/talks/talk.pdf