Scribd, as most of us know is a hugely popular service for uploading and sharing Microsoft Office documents or PDF ebook online. Scribd can also convert documents to Flash files which can then be embedded in web pages.
The other good point about Scribd is that you don't require an account in order to upload or convert documents into other formats like PDF, Flash Paper or MP3.
To upload documents to Scribd, you can either use their browser based uploader tool but what about documents that are already on the web ? Would you save them to your hard drive for uploading to Scribd ?
One of the option is to use the Slurping feature where you append the URL of your web document to the following URL and it gets copied on Scribed automatically.
http://www.scribd.com/slurp?url=[DOCUMENT_URL]
If that sounds confusing, get this new Firefox extension called Scribd Slurper - say you come a PDF document in Google search that you want to save on scribd - just right click that search result and select "Slurp to Scribd" in the contextual menu. Give a title, some tags and you're done.
Even if you don't use Scribd for sharing or storing documents, this is useful when the Google cache cannot render the PDF document properly - view the file inside Scribd - it will be much convenient than downloading the file locally and viewing it Adobe Reader or Foxit.
Bonus Tip: Use filetype:pdf with your Google search queries to limit the search to Adobe PDF documents.