That Youtube vid yesterday? The one with Teo Macero talking about how he assembled the classic Miles Davis albums?
I came to that because Tom of MusicThing wrote an article for The Word magazine on why all records sound the same these days. It's a brilliant piece that gets into the center gears of the music-making machinery.
Central to the article are these two videos from the making of a Maroon 5 song.
I suppose you really have to keep working on a song after you're sick of it when you're at that level.