Given that your blog has great content, it should also be presented in an organized way. Link within, smart layer are some must have widgets for the same.
Content is the king - In the blogging world so diverse and big, you need to establish yourself with a distinction. the only road to it is good, original and valuable content. Be creative, different and surprise your readers once in a while.
Broken links irritate visitors and can badly affect your ranking. Check and repair all such links on your blog.