See, we're all so very different.
I gave up soda entirely a year and a half ago. I had some recently only when I was very ill with a throat virus (ginger ale is great when sick!).
For me, bigger than my DMD is my diet. I went low Saturated and Trans fats and cut out red meat entirely. I am so much more aware of what I eat now, where I wasn't before.
I'd stop my DMD before I stopped eating this way. It's almost the Swank diet, but there are some points of Swank I can't observe (I can't have fish/seafood etc due to allergy).
Quitting smoking was a big piece of the puzzle for me as well

And exercising daily. Positivity, definitely!