Use TuneUp to organize your iTunes library properly. This application for Mac can correct mistakes in the name, author, or album of any song.
Drag and drop songs with incorrect metadata to TuneUp in order for the program to analyze them and get the right information. The free version of the program lets you do this action up to 100 times.
The Cover feature lets you do the same thing, but with the album art. You can use it to get up to 50 covers for your albums.
If you don’t want to manually adjust all this information, TuneUp incorporates a feature that analyzes how many songs have incorrect information.
TuneUp also shows information about concerts happening near your location, according to the artists you listen to on iTunes.