What you need to know about blogging is that you're not creating a website, it's more like a conversation. Consider yourself writing a book, while the rest of the world is watching. The beauty of blogging is that you can receive immediate feedback on your articles. It's a discussion between you (writer), the readers and other bloggers.
Pick a subject your passionate about.
Write something witty. People want to hear your opinion!
Ask people for their opinion (and here comes the comment-waterfall)
Be sure to promote your articles thru other blogs, with related subjects. Or write articles about articles that you just read to create pingback (which bloggers are very thankful for :))
I have to say, I'm not blogging that long, so I'm just starting to figure out everything to. Be sure to check out my hubs and blog @ http://www.whenigetrich.com. I'll definitely be giving you the heads up there about everything I figure out!