Would this be silly?

[AyuRox]

Probably. As far as space on your computer goes, you more than likely have plenty of harddrive space. But if you tell me which operating system you're using, I might be able to tell you how to find out much you have left. As far as iPod space goes, the iPod automatically stops adding songs when it reaches its limit. However, the order in which it puts songs on can affect which songs end up on the iPod when it reaches its capacity. You can control this by loading the songs on playlist by playlist. In iTunes, go through "insert-your-name-here's iPod" then click the music tab near the top, and then there should be a check-box for "only sync selected playlists" (or something to that effect). If you aren't using an iPod, then I'm not sure... (sorry)