Its not overly obvious, but there is a way to work on a blog article in draft form before you publish it to the site. When you create a blog and write some text at the bottom on the right side is a button called Save Draft. This will save your article but no one but you will be able to see it.
The tricky part of this is getting back to the article when you come back to finish it. I find the easiest way is to:
- Login to the site.
- Click on the Blogs link at the top.
- Click on My Blog.
- At the left of the center column is a Manage Blog link. click it.
This will give you a listing of your blogs, published and un-published. If you write a lot, this is also a good tool to keep track of your work.