Jstor, the ISI data-bases, google scholar and the like all are incredibly helpful to actually search for papers and even provide means to save you the tedious work of typing over all the bibliographic details. Depending on the way in which you organise your research, zotero may become an invaluable helper, too - especially as it retrieves details for books from their page at amazon. For, obviously, books hardly ever feature in databases focusing on journal papers.
