BOUNCE RATE is "The percentage of visitors to a particular website who navigate away from the site after viewing only one page"
The lesser the bounce rate more the beneficial...
According to my experience, you can reduce the bounce rate by involving the visitor in the content.
Some tactics I know,
1. Write the content clearly.
2. Put 1 or 2 eye-catching Images in the post
3. create a good User interface. (Theme layout should have user-friendly navigation)
4. Fast loading pages.
5. Headlines and subheadlines must be informative and attractive.
With all these strategies a visitor cannot go out from your blog.