How to skip music tracks with screen off? Is there a way to skip songs/music with hardware buttons and without having to turn on the phones screen?

A while ago, I had a phone with a custom ROM that allowed me to skip between songs by long pressing the volume buttons. Long press in VOL+ changed to the next track, and in VOL - to previous track. It was very useful, specially when I was driving, having my phone connected via a simple 3.5 plug to plug cable (to the aux. port), so i could just grab the phone, and press the keys without having to even look at it.

Now, with my new phone, and stock ROM (4.1.2) , I don't have that option, so are there some apps or hacks that i could use to allow such functionality?

I am already rooted, but there are (currently) no custom roms for my device (a motorola RAZR D3 XT919), 

so what is my best option?
Try Smart Pocket app, you can skip tracks with single or double volume clicks.