Alcohol is definitely cunning, baffling and powerful. I can relate to the mental obsession you describe. What helped me in those 1st few weeks with the cravings was.
Identifying my triggers - Write them down
When a urge comes, ride it through and occupy yourself with something positive - again, write down some positive things you can do.
Log onto SR regularly and make that 24hr commitment
Change your routine - take a different route home from work, go for a walk ect. Again make a list of routine changes and write them down.
Every time you make it past a craving, each time you beat it, you become stronger and it's the start of retraining your brain. Each time the cravings will lessen. Time is the greatest healer..
You can do this