pro-tip for anyone trying to kick a soda (or alcohol) habit: get yourself a seltzer maker, and an assortment of bitters (Fee Bros Cranberry, Walnut, and standard Angostura are a good place to start).
This is just my personal experience, but I found that most of the unhealthy drinking I was doing was out of habit and boredom. I’m just as happy with a seltzer + a few dashes of bitters as I was with a beer or a coke.
Even if you don't get something like that, just having a glass of water nearby is a great way to reduce consumption. I drink a lot of diet soda and it's mainly out of compulsion to constantly drink liquids. If I keep a nice cold cup of water near where I am, the soda consumption drops super fast. Once I start drinking water during that day, that's usually what sticks.
For me, it's almost all about the habit of constantly drinking. That said, even though I know how to kick the habit, I still tend to drink a lot of diet soda because it's a nice pick-me-up.
This is just my personal experience, but I found that most of the unhealthy drinking I was doing was out of habit and boredom. I’m just as happy with a seltzer + a few dashes of bitters as I was with a beer or a coke.