Basic Article On Chaning Habits

http://www.huffingtonpost.com/james-clear/breaking-habits_b_3540148.html

Pretty good article. My question though remains unanswered:

I've replaced PMO with another habit (eating carbs, muffins, crackers, etc). But now I'd like to stop that habit also. Should I replace that habit too? What if the replacement is another habit? Will I have to replace that one as well?

I guess the best idea is to replace bad habits with good habits but I can't think of a good habit to replace this carb habit. Perhaps veggies????