Is there any way to undo "I'm tired of this song" in Pandora? I accidentally hit it but I really would like to hear it as often as possible. Any way to undo this mistake?
For 'Thumbs Up' and 'Thumbs Down', you can remove the effect by going to "My Profile", selecting the station involved (you might only have one), and then finding the appropriate section (e.g. 'Thumbed-down tracks'). Find the song's entry in that list and click the 'x' to remove it. For 'I'm tired; don't play for awhile', I don't know of a way to explicitly control it.
After 30 days, it will come back.
This is from their blog: "Now there’s a way to tell Pandora that you’ve heard something one too many times: just click Guide Us and select the “I’m tired of this song” choice and we’ll put the current song back on the shelf and not play it again on any of your stations in the next 30 days."