Machine learning is the new black, and it seems that everybody wants to be a data scientist. But to be a great Data Scientist you need to be a good mathematician, a curious analyst, a smart computer engineer, an expert in the problem's domain, and a charming person overall. Furthermore, with the field moving so fast, you have to run at full speed just to stay in place. In this talk, I'll discuss the top mistakes people make in their early days as data scientists and give tips for a smooth and successful transition.