One of the hardest things for most entrepreneurs and startup founders to know is how hard to push in situations where people tell you “NO”
But then again most entrepreneurs fail at this! There is that rare breed that don’t want to accept “NO” for an answer. But this is an almost impossible thing to teach and instill because of the fine line between being persistent and being utterly annoying. The magic of climbing right up to the line of acceptability without crossing over it is something you either have it or not, it cannot be practiced and taught.
Being persistent is the most important attribute for success in an entrepreneur, assuming of course that one has all the other requisite skills.