THE BIOGRAPHY LINK http://muskingum.edu/~psychology/psycweb/history.htm This site gives biographies of many psychologists as well as providing links to other history-related sites. Read the biographies of Hull, Tolman and Guthrie.
PRESIDENTIALLY SPEAKING http://psychclassics.yorku.ca/Guthrie/ Read Guthrie's 1946 presidential address to the American Psychological Association.
WE DON'T NEED NO STINKING THEORIES! http://psychclassics.yorku.ca/Skinner/Theories/ Link to a classic paper by Skinner, in which he argues that scientific progress may be made by not developing and testing theories.