We all have a specific bad habit we'd like to break. Odds are, you've tried in the past and maybe you were successful for a few days. Then something unexpected came up where you slipped for a day or two. One mistake snowballs into a series of setbacks. Eventually you give up on the idea of making a habit change simply because it's too difficult to do.
It doesn't matter if you've failed with your habit efforts in the past. It doesn't mean you're lazy or weak-willed. It means you didn't have the right tools for making a lasting habit change.
What you need is a strategy for identifying your worst habits and learning how to overcome them. That solution is a book called: "Bad Habits No More: 25 Steps to Break ANY Bad Habit."