To access the NGSS Website and download your copy of the new standards click here: NGSS website.
The NSTA/NGSS website contains much information about the new standards: http://www.nsta.org/about/standardsupdate/. In particular, NSTA held a series of webinars on the NGSS Scientific & Engineering Practices and is continuing the series with webinars about the Cross-Cutting Practices. The URL for the archive of these webinars is http://learningcenter.nsta.org/products/web_seminar_archive_sponsor.aspx?page=NGSS It can be useful to download the PowerPoint that goes with each webinar; these are also found at the URL given above.
The Framework that is guiding Achieve in the writing of the standards is available for free at: http://www.nap.edu/catalog.php?record_id=13165