When you study a subject, do you compare sources of information to determine which sources are the best (e.g., authoritative, detailed, etc.) and should be referenced in your notes? If so, how do you compare multiple sources while never having more than eight tabs open?

When I study a deep subject, I almost always end up with hundreds of tabs, including articles, papers, reports, policy statements, discussions, etc. I use the wonderful Tree Style Tab and Session Manager extensions for Firefox to organize tabs and manage sessions. After I finish my research, I process the hundreds of open tabs and add references to the best sources in my personal wiki, which is powered by Org mode.