My two cents:
Push the fear aside and decide.
If there is any alcohol in your home, get rid of it before you leave for work, then decide you will not purchase any more.
Then put the thoughts aside, but realize that they may come up again during the day.
When that happens, remember the feeling you had waking up this morning. Go home, don't drink. Watch tv all night, or bake cookies or needlepoint or clean your closet or hang out here or take a long bath or just go to bed.
I'm talking to both of us here.
It is SO much better to wake up without regret (not to mention without withdrawl symptoms/the hangover!).
How could we not want this every single day?