For me, one big part of the weight loss was getting rid of the Pepsi I usually kept stocked in my home and my office.

I found the best thing for me for getting off of soda is to drink tons of water. I have a 30+ ounce water glass at work that I fill up at least four or five times a day. If I am constantly drinking water it never seems to occur to me to go grab a soda from the fridge. Plus there are a ton of other benefits to drinking lots of water. Of course every hour or so requires a trip to the bathroom, so there is a tradeoff