To eliminate entering your password to hear your voicemails:
Touch the green phone button to get the phone pad screen up, BB button/Options/Voice Mail. You should see your phone number and below it Password: (Fill this in along with the # sign if required) and Save.
Holding down the "1" key will automatically dial into your voice mail, and automatically programs a 3 second pause, then enters your password and you have access to your call messages.
(Especially helpfull if you have ScreenLock or an equivalent program.