My iPhone 4 won't sync with itunes?

Help ME! I'm getting really tired of this. I can't get my music from my itunes onto my phone… I don't know what i'm doing wrong…

Added (1). I've figured it out! I imply needed to drag my playlists to the device haha

I had this problem once. It turned out that it wasn't recognising itunes. Try factory resetting your iphone! Or consult an apple worker!
Hope this helps and happy new year:?

You should find out where all your files are actually saved to and just copy and paste them from that folder. Should work and if not I would try turning off both of your devices and restart iTunes.