How-to books may help to get you started but there is no perfect process for writing your dissertation. It is very important that you check with your mentor and your committee to get their points of view on the dissertation process.
Consider reading this article: Kamler, B. & Thomson, P. (2008). The failure of dissertation advice books: Toward alternative pedagogies for doctoral writing. Educational Researcher (8), 507. doi: 10.3102/0013189X08327390
Resources for Dissertators/University of Wisconsin, Madison (handouts; links to other writing sites)
ICPSR
The Inter-university Consortium for Political and Social Research maintains the world's largest archive of computerized, numeric social science data. Topics include demography, economics, health care, politics, social behavior, public opinion. Access these from the Library database list.
The Craft of Research by 
Writing Your Doctoral Dissertation by 
Revising Your Dissertation - Advice from Leading Editors by 
Proposals That Work by 
Supervising the Doctorate by 
Surviving Your Dissertation by 
Writing the Qualitative Dissertation by
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