Q: How do I turn my iTune songs into ringtones

On your computer's iTunes :

- copy the song into your computer's iTunes library, or (if an iTunes purchase and it's still in the store) redownload it from Purchased on your computer's iTunes

- select/highlight it in the My Music section of your library and do 'get-info' (control-I on a PC ; command-I on a Mac)

- change its start and/or end times so that its length is a maximum of 30 seconds (I think 30 seconds is still the limit for a ringtone)

- exit the 'get-info' popup and with the song selected do File > Convert > Create AAC Version (if you have something else showing, e.g. 'Create MP3 Version', you will first have to change your music import settings on the General tab in iTunes preferences). That will create a new 30 second version of the track

- find that new track on your computer (e.g. if using windows right-click it and select 'show in windows explorer' ; on a Mac control-click and select 'show in finder')

- delete that new entry from the My Music part of your iTunes library (but don't delete the actual music file from your computer)

- in windows explorer/finder change its file extension to be .m4r instead of .m4a

- drag that file into iTunes, or use File > Add To Library in iTunes to add it

- it should go into the Tones part of your iTunes library, and you can then sync it to your phone