blogger.com and wordpress.com - 2 of the most popular free blogging tools, where you can get signed up and going in 1 minute or less

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Set up a wordpress blog: Wordpress is a free online blogging service that is fully featured, easy to use, and has a great support community. They also have Helps on how to get started blogging. There are many other blogging services available if wordpress doesn't suite you. Check out Tumblr, Xanga and here are steps on setting Up Blogger account.