I think emailing is great. However the sentence you highlighted: "A person’s success in life can usually be measured by number of uncomfortable conversations he/she is willing to have." is more about real communication I think.<p>So in my own experience if you change from cold emailing to cold calling it is more effective. Even more effective it is, if you directly visit the people at their workplaces or companies.<p>I sold a mobile app to my now clients like that. It means sometimes that you have to wait an hour at their secretary, but 5 minutes in direct conversation is of highest value!