As Tolle says, become the watcher of the thoughts of drinking by observing them without judgement.
Recognize them for being thoughts of drinking now or in the future (which makes them AV), and this includes doubt in one's ability to succeed at this, or fear of a sober future. All of this crap is AV.
Separate from them by reminding yourself they cannot be 'you' because you have made that vow to quit aka your Big Plan, and then,
Accept that these thoughts will come and go, all by themselves. When these thoughts of drinking leave us, (and they will, every single time) we remain behind, sober.
This always makes me think of this from a favorite book of mine. The similarities between AV and fear are obvious.
Fear is the mind-killer, the little death that brings total obliteration.
I will face my fear.
I will permit it to pass over me and through me.
And when it has gone past I will turn the inner eye to see its path.
Where the fear has gone there will be nothing.
Only I will remain.