Getting started on Twitter: #twutorial advice for a friend

A friend who hasn't used Twitter much asked some pretty basic questions that I thought might make a couple of #twutorial posts.

This post will focus on getting started using Twitter. Tomorrow I'll cover event promotion.

I appreciate when people candidly ask for help, so I have edited my friend's email to protect his identity. He was referred to a couple of specific event, but I have edited the references to make them more generic.