Conducting a Twitter audit

We all know how important it is to measure the impact of our professional activities.  Chris Brogan's article on how to conduct a Twitter audit shares simple, valuable advice - the number of comments, tweets and Facebook mentions shows that many others found it valuable too.Twitter is a conversational tool not a broadcasting channel.  Looking at your most recent 20 Tweets, count how many were @replies (conversational) and how many were broadcasting/marketing yourself.Most importantly of all, now is the time to create a plan for your Twitter account - exactly what is its purpose, and how will you measure its effectiveness?