I use
LiveJournal.com mostly because it is easy and it allows you to review it as far back as you want and does nothing to hurt the environment, being paper free. I also keep a personal blog on my website, link located in my signature. There is no rhyme or reason for the types of posts i make, especially in my journal. My blog is a little more structured, just a little. But just start writing a lot, and you'll finally get to where you need to be.