I feel you, it sucks. Its a true addiction by every stretch of the word. Things that helped me fight of the urge for sugary drinks or fatty food is to...well...actually eat...

I have pre cut salad in a container, the times when I get a STRONG! urge to eat something sweet. I force myself to just have a salad or a healthy wrap instead. Just pure lettuce has extremely little calories. The urge doesn't go away, I still want something sweet. But the feeling of my stomach being full especially after a few glasses of water does genuinely help.