New day, new tweak in Cydia: VolumeButtonExtender. This tweak will allow your to control music playback using your volume buttons. You can use it in the car, at gym, while jogging.
FSM EXCLUSIVE DEAL Once installed you are ready to go. You can skip to the next track by pressing on the volume up button for a couple of seconds, and return to a previous track by pressing the volume down button for a few seconds. If you want to pause the playback, you will need to press both buttons for a couple of seconds.
You can find VolumeButtonExtender for free in Cydia via the BigBoss repo.