Clearly communicate your blog topic right in the title. Avoid being vague.
As yourself, if you read the blog title, would you get a clear indication of what the blog us about. Be objective! If not, go back to the drawing board.
Your blog title should make people want to read more. It needs to be intriguing.
Be a bit mysterious but don't sacrifice your blog title's clarity. Impossible you say?
Not so. Here's an example - "Confessions of a Content Marketer". Your audience will know your blog is about content marketing but won't know what your use of the intriguing word "confessions" is all about.