1.Good blogs have a voice.
2.Good blogs reflect focused obsessions.
3.Good blogs are the product of "Attention times Interest."
4.Good blog posts are made of paragraphs.
5.Good blog posts are made of paragraphs.
6.Good blogs are weird.
7.Good blogs make you want to start your own blog.
8.Good blogs try.
-I hope this one helps you...for more detailed answer try to have a look at this link:http://www.43folders.com/2008/08/19/good-blogs