How to win friends and influence people

Dale Carnegie wrote such a book a few decades ago and it should be a required course in high schools in my opinion. When I think about it 99% of problems we have stems from people. Breakdowns in communication, tempers, annoyances, and other issues begin with people. I am having some problems with resolving some disagreements and am trying to figure out how to best approach it. This doesn't include the other stuff on my mind like how I am going to take 14 credit hours of school while working full-time next semester. Now that I'm thinking about it what energy drinks are most effective?