One of the best pieces of advice I got when I went to orientation was to begin organizing my research citations from the start. Easier said than done, but there are some digital tools that help make this happen.
There are many programs such as zotero, refworks (the GC library offers a free license), and endnote that help do this. The GC library also offers free advice/tutorials to help sort through the options as well.
Mendeley was recommended to me and has proven to be quite useful. With Mendeley you can:
Easily transfer citation information from worldcat into your Mendeley library.
Organize your pdfs into themes.
Instantly export your citations into works cited lists.