Alcoholics have tremendous willpower
Never a truer word said. An alcoholics drive to get a drink is stronger than any other drive, even the basic biological needs to live.
In order to stop you have to find within yourself a drive and willpower over and above the drive to drink: the will power to not drink.
Change of routine is a good idea. Perminant change.
Distraction techniques, keep yourself very busy on non-demanding tasks. Mindfulness tasks are good, colouring in for example. Or cross stitch. Or gardening, decorating. Whatever is your thing.
Get rid of all alcohol. Obvious one.
Drop any assumption you can 'just have one tonight and that's it for the week' (or whatever). You'll need to abstain. Not drink at all.
However life situations can break you sometimes.
That's an excuse, not a reason. Stop kidding yourself. You can look after a disabled child and not be an alcoholic. I realise this is not hand-holding and supportive, but it's a cold hard fact that you need to accept.
You don't drink because you have a hard life. You have a hard life and you drink. The two are mutually exclusive.
You choose to drink.
You have to choose not to drink.