In iTunes preferences, select 'copy to Itunes music folder when importing', and also select 'keep iTunes Music folder organized'. This means that every time you import from CD or add to your library from somewhere else on your system, iTunes copies the files into User > My Music > iTunes > iTunes Music. In this folder you will notice that all files are organized by Artists> Album> Track. In addition, all of this info is updated automatically when you edit names inside iTunes. It's the ebst way to keep your music organized. If you've already got a lot of stuff inside iTunes, you want also want to select 'consolidate library' which will copy to the iTunes Music folder anything that was added to your library BEFORE you checked the options above.