This text started as a somewhat random list of things, which Florian has ever noticed are interesting or important for a student to know but which sometimes nobody tells them. Later Deyan Ginev put it on Authorea to make it accessible to a wider audience.
This text is not particularly well-organized but still an extremely valuable resource for students. Many points apply in general; some are specific to Florian’s field of theoretical computer science; some are specific to him.
Note that this was advice was collected over a decade, originally without any intention to publish it. Therefore, it lacks attributions even though some of it is advice Florian got from other people.