Sometimes you just want to make your page as SEO'ed as possible but can't find or remember all the meta tags. This is a complete and up-to-date list with all the meta tags and link tags I've found on the internet over the years. If you have others, let me know.
There are 100's of Social Bookmarking sites out there, and most of them don't have API's. This RubyGem builds a simple API over the more popular social bookmarking services to automate publishing. It definitely streamlines the workflow.