Closely look at the usage of high traffic query modifiers like, cheap and free. I am starting to wonder of search engines are (or already have) reduced the relevance of these modifiers.

The company comes with some other interesting insights like singular is more closely used with laptop accessories. They are also making a point that plural terms send more traffic compared to the singular terms. Read the complete story Plural or Singular search terms?

Zotero is an extension which is extensively used by researchers around the world. What it can do is take information accumlation and storage to next level. From managing your citations to bibliograpy, it easily beats out most of the proprietary softwares like end note. Being a community driven project it enjoys great support. All the features of Web 2.0 like tags and snapshots are integrated in this extension. Personally this happens to be one of my favourite extensions.