Assuming you mean cutting soda out entirely and not just diet soda, I just want to reassure you that it does get easier. I've gone from drinking a can or 2 at lunch/dinner to only drinking like a handful of times a year (only at parties/events for social purposes). In my experience after the 6 month mark, soda straight up tastes bad and at that point it's smooth sailing. Your teeth and wallet will thank you.