Find something that is sustainable for you.

So far I've found that I can consistently make healthy lunches for the week on Sunday nights is a habit I can keep. On the other hand, tracking every food I eat (on an app like MyFitnessPal) is probably not something I can keep up with.

Just cutting out the soda is a great start, I'm sure you'll enjoy results! I'm sure you have many steemit friends who will be cheering on your success. :-)