Self-determination Theory (http://www.psych.rochester.edu/SDT/index.html) - a site from Edward Deci et al. on their motivational theory -- it includes an overview, bibliography, discussion of the reward controversy (overjustification effect), related scales that can be downloaded and more
Polling Data (http://www.pollingreport.com/index.html) - PollingReport.com states that it is "an independent, nonpartisan resource on trends in American public opinion." You can find an extensive collection of polling results on a variety of topics here, and it is kept current.
World Values Survey (http://www.worldvaluessurvey.com/) "The World Values Survey is a worldwide investigation of sociocultural and political change. It is conducted by a network of social scientist at leading universities all around world. The survey is performed on nationally representative samples in almost 80 societies on all six inhabited continents. A total of four waves have been carried since 1981 allowing accurate comparative analysis." Findthe questionnaires used. Data sets are available for analysis, even some online analysis.
A blog on analyzing polling data (http://politicalarithmetik.blogspot.com/) - "Political arithmetik: Where numbers and politics meet" is a blog from Charles Franklin, a professor of political science, in which he explains political bias in polls, the statistical analysis of them, and more. Lots of good examples and very detailed analysis.
Attitude-behavior consistency? Here are three resources that explore this question for the relationship between abstinence pledges and actual behavior.
"The education of Shelby Knox" (http://www.pbs.org/pov/pov2005/shelbyknox/) - In a P.O.V. show on PBS, "A self-described 'good Southern Baptist girl,' 15-year-old Shelby Knox of Lubbock, Texas has pledged abstinence until marriage. But she becomes an unlikely advocate for comprehensive sex ed when she finds that Lubbock, where high schools teach abstinence as the only safe sex, has some of the highest rates of teen pregnancy and STDs in the state."