For me and, I think for most people is understanding who you are, understanding your personality. Understanding what type of things you are going to fit well with. Some people just grind through it. It does not matter what it is they; are just going to outwork and fix it that way. And for me that is torture. I can't imagine just pushing. I don't enjoy that. I am much more of the work smarter, not harder mindset. So really understanding who you are and what fits you well.