iTunes with multiple computers
I have iTunes installed on my machine at home. When I sync my iPod, I usually use that machine. When I'm at work though, I sometimes want to copy one or two songs onto my iPod. I don't want to reformat it and set my work iTunes as the machine to sync from. The simplest way to be able to do this seems to be to select the "Manually manage music and videos" in the Summary tab of my iPod under iTunes. If I mark the checkbox, I can then drag and drop songs into the music folder. Apple has a page with more detailed instructions.

