Writing a blog is not enough thing to build regular readers. You need to maintain the regular readers.Also security is also a big thing. Here is few tips for new bloggers to maintain their blogs.
1. Reply to comments within 24 hours or as soon as possible. Some people think if they reply comments lately the reader will come again and again to check whether there is a reply or not, but remember this is internet and your blog is not only the source for information.
2. Protect your blog from vulnerabilities: Update your wordpress version as the new stable version gets out, also use wp-security-scan plugin for security checks.
3. Use auto spam delete plugin like Cookies For Comments, To decrease spam boat loads on your wordpress installation.
4. Install & Enable WP-Cache plugin,Wordpress with high users gives load on database.This plugin helps to prevent MYSQL Server busy or 500 Internal Server Error.Your site should load fast at any time of day.
5. Develop relation between your readers, Give them several ways to contact you.Reply to each of emails as soon as possible.
6. Take critics positively. Critics are path to success.
7. Don’t be a brand. Reply to things or other things as an Individual.
8. Provide easy access to posts which are most famous,important. This will create great impression in new visitor. First Impression is Last Impression. The reader will get an force to become subscriber of you.
9. Use a quick loading theme for your blog. Try to have your large picture in the theme.
10. Do ego surf time by time. Read: http://blog.kpsofts.com/2009/06/search-engine-optimization-by-ego-search.html