A critical skill for conducting effective research is citation management. We recommend that early researchers begin to keep track of references using one of the many available software packages designed to assist this process as soon as possible. The following Wikipedia page offers a helpful comparison of these products.
Comparison of Reference Management Software
Endnote
Mendeley (iTunes for papers)
Reference Manager
Papers (iOS app)
Zotero
In addition to the above, a number of websites exist that perform a similar function.
Endnote Web: Web-based reference organizer and writing solution, fully integrated with ISI Web of Knowledge.