As a sticky, I have reposted my 2012 NaNoWriMo prep post (below). Most of the resource links remain relevant three years later, and the checklist is a good one.
Also, for further resources, check out the search on ‘NaNoWriMo’ – I have several good posts. Including one with this PDF checklist which I am reposting here. Just click on the image or NaNo Checklist download to download it.
This checklist used to be a signup incentive for the now defunct Tech4Writers newsletter, and was also given away in a pack of PDF’s last October. It’s now yours for free.