I was going to mention soda as well, but I'll just add that there's another benefit to quitting soda. Soda is a major cause of tooth decay, because of it's acidity. Not in a small way too. Some are nearly as damaging as battery acid. I've since started drinking earl grey tea, with some cream I think it's better than soda.

Here's a source on that tooth decay thing if anyone is curious.

Here's a comparison chart for your benefit