At first, I thought I would just cut back gradually, but that didn't work for me. So, I quit drinking soda cold turkey. I had horrible withdrawal symptoms for about two weeks including nervousness, anxiety, and an intense craving to grab a can of carbonated chemicals and pop the top. That just confirmed how addictive it is and how bad it was for my health. After two weeks, the withdrawal symptoms abated and I didn't miss it at all. I know several people who have experienced reduced inflammation and reduced pain just from cutting out soda and not doing a single other thing.
What do you drink, instead, when you let the soda go? Tea, coffee, and water are great substitutes. I don't like coffee. (Coffee lovers, please no snarky remarks. I gotta be me.) I've always liked hot tea. I used to just plop a tea bag in a cup of hot water.Now I enjoy trying all kinds of loose leaf organic teas. I had no idea there were so many choices. My current faves are Darjeeling, Irish Breakfast, Nilgiri, Oolong, and Russian Caravan.
Ditching processed food, along with other practical priorities for creating a healthier life, eventually lead to reducing every single one of my fibromyalgia symptoms. I've remained symptom-free for almost seven years. That's a million times more delicious than any processed food I can thing of, including soda.