The inaugural Thought You Might Be Interested Thursday features YouTubeRepeat. Find a video you want to watch or listen to over and over and over... this is what I do when I am writing and concentrating. Usually to Indigo Girls, Closer to Fine specifically.
Anyway, YouTubeRepeat does just what it says. You replace "tube" in the YouTube URL with "repeat" and bam! You can repeat the video. Or, as the graphic to the right says, drop the URL in to the box on the home page.
My new favorite online tool.