How to put music on my droid razr?

I have had a iphone for the last couple years and I have always used itunes but now that i switched i'm not sure what to do to get music on my phone. The guy at verizon said there's some app that will switch and put music from itunes onto my phone… Anyone have any ideas? Or better ideas!

"Doubletwist"… Stream your itunes library for any android phone… Derp

as for you mp3s on your computer… There are 2 ways…

1) windows media player… Connect phone to pc… Put phone in usb mass storage mode--click on usb icon in notification bar… Open WMP… It will see your phone internal drive INT and external sd card EXT… Click sync on the drive you want all the mp3s to go to… Otr make a playlist first and then click sync… This takes 5-45 minutes depending on yoru pc and mp3 amount… Reboot phone for good measure… Have a beer… Enjoy…

2) old fashion way before sync was invented… COPY AND PASTE… Connect phone to pc… Put phone in usb mass storage mode--click on usb icon in notification bar… Open COMPUTER in start menu of pc… Your phone INT and EXT drives will show… Make sure the drive you want has a "Music" Folder… Just as I typed it… If not, make one… Copy and paste your mp3s into this folder… Reboot phone for good measure… Have a beer… Enjoy…