You need to set yourself up for success. If I'm postponing going out for a run, I may just put my running outfit and shoes next to my bed so it's in my sight wh

You need to set yourself up for success. If I'm postponing going out for a run, I may just put my running outfit and shoes next to my bed so it's in my sight when I wake up. If I'm getting fat I may just stop buying sugary foods to limit access. And so on, making it easy to do the right thing and harder to slip.