This post has been updated recently to help you setup and verify your Google authorship. Setting it up is now easier and is recommended that you do Read the full story: Google Authorship
Google SERP Snippet Optimization Tool
It visually simulates how Google displays your title and description information on their search engine results pages. Read the full story: seo title & description serp
Twitter shows up in Google SERPs again
Could this mean that Google’s loosing up Plus Your World to include other social networks? Read the full story: Twitter shows up in Google SERPs