I've broken my screen on my ipod touch 4th gen. where do i take it to get fixed?

Apple will exchange your iPod for a refurbished identical model for $99 (for 8, 16, 32 GB; $199 for 64 GB) at any Apple store or authorized seller. Third party repair shops will replace the screen, probably for less (or you can do it yourself). Google "repair iPod Touch" to find dealers.