3 reason PhD candidates should become bloggers.

First, a CV style page is useful for others to find you and learn about your (common) interests (vis versa too) For examples, I have connected with a researcher in Canada, who did is helping me to learn Text analysis from Twitter.
Second, a blog is a great way to teach others what you’ve know (http://oxbridge-tutor.co.uk). Some say that teaching others it the highest form of learning. Also, it can be used of demonstrating your teaching ability if you are not teaching as yet.
Third, some academic bloggers also created businesses from their knowledge and experience. The best person I’ve been following for some time is Cal Newport. Cal is an Assistant Professor at Georgetown University (Computer Science). He wrote, published and run workshops starting as an undergraduate to today. Here are the links to his online work.http://people.cs.georgetown.edu/~cnewport/

I’d be interested to hear how others think about creating a path outside the traditional world of academia that way.