I am a computer science Ph.D. student. I have written a couple of research papers and some of them are under review. I have started becoming fearless from some time as my past experience has told me that with time and with hard work every research problem is solvable to some extent (make something publishable out of it). I have tried to now pick the research which is less related to my previous research works. I am doing this thing on purposefully as I don't want to narrow my research domain. My belief so far is that pick something read few papers for some months and purpose a question take more months and then write it.
Question: I am wondering what are the other things which I can try to be more fearless or what are the things students should practice in order to become more and more fearless? I used to a person with lots of fear but now I have become confident. I know fear some time push me but after failing some projects I have become a fearless person.
Some meaning of the fear is to take the courage to pick a research problem and solve it and make it publishable.