Databases to support your research:
(Go beyond Google Scholar - databases often have far more resources)
CSA Sociological Abstracts - indexes and abstracts in sociaology
PsychINFO - Psychology and related areas
ERIC - Over a million records - including "What Works Clearing House"
(See also Gorard's information about writing literature reviews -
And be sure you keep up to date with other research going on in the department - some of it might be of interest to your own work!