my ipod 4th generation lags a lot...what should i do?, my ipod 4th generation lags a lot...what should i do?

When its low on space it could cause this. Delete any un-necessary files by taping Settings>General>Usage.

If that doesn't work, you can try restoring it.

Another reason for the lag is because you are running IOS 6 (iPod Touch 4 was meant for IOS 4)

Periodically double click the home button and close all the apps in the recently used dock. Then power off and then back on the iPod. This frees up memory. The 4G only has 256 MB of memory.