I posted a blog and now cannot find it - help

Do you remember the username that you used for this blog? or do you know what name did you use for this blog? What was the content of this blog? try searching with all this information on some search engine and it may help you. It has happened with me also, but I had written the name of the blog somewhere, and also you must have received an email when you should have made this blog so check your email account. Your email account should have the details of this blog.

Any time I can't find something I look under the couch

Hmmm did you register on a site? If so they probably sent you an email with your user name and password. The other place I would look is in the History of your web browser (open your web browser and hold down the Ctrl + H to open the history window)