Writing (such as literature, history, and psychology)
Purdue Online Writing Lab (O.W.L.)-ATTENTION LITERATURE, HISTORY,AND PSYCHOLOGY STUDENTS!!! This is the place to go to when writing papers in MLA and APA style (these are the most commonly used). The website goes over EVERYTHING: how to cite in-text, how to correctly write a bibliography, how to cite electronic sources, etc. The site also includes sample papers, like this one in MLA, classroom posters (MLA poster), and even Powerpoint presentations on MLA and APA styles.
Google Scholar-Is that pesky teacher asking you to use sources not named Wikipedia? Google Scholar is just like using Google but your results will include CREDIBLE, REPUTABLE, and SCHOLARLY pieces of writing from journals and books. You can also easily filter your results so that you end up with current, relevant information (not some random article from 1972).