The Structure of Scientific Revolutions A Book by Thomas Kuhn You need to make the step forward sciencephilosophyprogress
Writing and Speaking An Essay by Paul Graham paulgraham.com Being a really good speaker is not merely orthogonal to having good ideas, but in many ways pushes you in the opposite direction...there's a tradeoff between smoothness and ideas. All the time you spend practicing a talk, you could instead spend making it better. writingspeechcommunicationpractice