Here’s What to Do Dale Carnegie’s book, How to Win Friends and Influence People teaches four major leadership lessons. Here’s an easy look at what to do – and what not to do – as you establish a solid leadership style in all areas of your life. How to Handle People Do Be understanding and forgiving Help your colleagues truly want to do what you’re asking Don’t Criticize, condemn or complain Give insincere appreciation How to Make People Like You Do Become genuinely interested