Before making a telephone call, do you ever rehearse what you are going to say? Why?
It depends on the nature of the conversation. Most of the time, no. I'm fairly quick witted and have a decent vocabulary so have confidence, more often than not, in just being able to have an honest conversation with someone. But there are circumstances, say for a phone interview, where I'll review information, practice responses to common questions, and try and think scenarios out and how I might handle them. These aren't frequent circumstances though.