I’m not planning to just quit soda.  I’m going to ween myself.  I usually bring 4 in my cooler to work every day.  Tomorrow, I’m going to replace 2 of them with water bottles.
Next week, I’m going to replace another.  The following week, I’m just going to bring water.  The week after that I’m going to go without soda.  I know it will be difficult because I’ve been without soda for a few hours… it’s an addiction.  I have to have a plan, though, and this is the best I can come up with.
God Bless!