Randa Clay has put up a post on Performancing with the same title and gives some great tips to get people to stick around or visit your blog more than once.
- Use a Related Posts plugin
- List your most popular posts in your sidebar.
- Make your feed prominent and offer multiple options for subscription.
- Build “Flagship Content”.
- Install a subscribe to comments plugin.
Check out the full post at Performancing for links, and more details.