In your goal to
quit smoking, you have probably self-discovered the powerful-forces of associations you have with smoking. For example, the smoke after a meal association, or the smoke with a cup of morning coffee association, or whatever those associations are for you. Your success will be dependent on your ability to change your behaviors and eliminate these powerful associations. You may need to change who your friends are for your long-term success as smokers generally hang out with smokers.
Also be mindful of when you are in relapse. Relapse is not the act of smoking but all the little itty bitty behaviors leading up to a smoke you may have in your long-term journey. Relapses are quite common and should not be looked at as failure. That's not to encourage you to light up in moments of weakness however, but to merely point out that they do exist.
Your journaling is a helpful tool and so is exercise, particularly cardio-vascular intense activities such as
brisk walking, running and circuit training.
Take it one breathe at a time and focus on just getting through another day.