What basic sources do you use for your research paper?

What are some sites that I can go to when researching data in general (not including my university library)? What are good sources of information besides books? I have taken down the names of some basic news sites as well as a few magazine sites that specialize in what I major in (psychology). I would also like to hear from those who use poll sites or studies. The case studies I’ve found want rental fees which I simply cannot afford! Thanks.