Next September I will be starting the most important part of my Ph.D in Mathematics: the "go and do something original!" part. To be honest, as someone who never did reseach before, I am a bit scared about it. As I am sure there are many many people in my situation, I would like to ask a question on Academia with the purpose of compiling a list of some of the most important things one can do to increase the chances of succefully going through (and completing) a Ph.D. Of course, I am not looking for general things like "work hard everyday"; ideally, it would be more specific and helpful things.
I am sure that the large experience of the community members would make this possible, and that some valuable tips would certainly arise; but is this question too broad and/ or too opinion-based to fit here?