Rank Better In Google Blog Search

Google Operating System informs that Google Blog search ranks the search results by relevancy. The sort by date is also available. However, it is interesting to note the way Google ranks blog posts.

Positive signals

links from blogrolls (especially from high-quality blogrolls or blogrolls of "trusted bloggers")
links from other sources (mail, chats)
using tags to categorize a post
PageRank
the number of feed subscriptions (from feed readers)
clicks in search results

Negative signals (spam signals)

posts added at a predictable time
different content between the site and the feed
the amount of duplicate content
using words/n-grams that appear frequently in spam blogs
posts that have identical size
linking to a single web page
a large number of ads
the location of ads ("the presence of ads in the recent posts part of a blog")