I'm addicted to blogging. For me it's a perfect outlet - I love to write so blogging has become a passion for me. It's also helped me position myself as someone who knows a lot about different topics. My blog for the Virtual Assistant industry was set up to help both VAs (new and experienced) and clients understand more about the industry and how clients can be helped by VAs. I've had this blog for 3 years now and have written over 300 posts.
I recently ran a competition on it to celebrate my 14th anniversary - the winners will be announced on there in the next hour.
I tend to pre-write most of my posts and set them up to publish at specific times, using Wordpress as my preferred blogging platform. But I do have some blogs at Blogger too, just to keep my hand in.
Just to show how addicted I am, I own 15 blogs and you can see them all listed at
http://kathiet.blogspot.com/2007/04/blogging.html
If you want to write a book, blogging is a great way to test content too - I did this by accident and ended up turning one of my blogs into a book last year. That books is now available in bookstores in Australia and online globally.