If you just made a big mistake and deleted your blog, or if you're the latest victim of an over sensitive Blogger anti-splog bot, recovering your blog will involve Blogger Support, and the Blogger Support Help Form.
But don't start there - start by setting up a stub blog now.
Then finish the initial recovery:
- Recover the template (you did backup the template, at least once, right?).
- Fill out the Blogger Contact Form.
- Wait for Blogger Support to recover the blog, from their backup.
Optional steps while you wait for Blogger Support to act:
- Put a post in your blog.
(Blog Title) Coming Soon.
- Admit that you were an idiot (yes, you were - admit it).
(Blog Title) Coming Soon (Sorry - I goofed).
For a more complete procedure on blog recovery, see Aurea Martin (aka O.K., O.K.!) Erased your blog by mistake?.