Halle to answer your question, it took me a day or two 
It took me a few chapters of Jason Vale's book to realise two things.
- that yes I did have a problem as do so many people who drink to excess, even those who don't consider it a problem (he doesn't like the word 'alcoholic' and instead lays it bare that anyone who needs to exercise any amount of control - whether it be sober days, water between drinks, limits etc - in fact is being controlled by alcohol all the time and is therefore not free)
And 2) that alcohol does absolutely nothing positive for me and is in fact the cause of a whole host of my problems, and so drinking was doing me way more harm than good, so it's a no-brainer to just stop doing it.
I was drinking a lot. Not in the mornings, or when driving or anything, but definitely pushing my other 'restrictions' such as kids and work and general life, and drinking to 'get through'. Except that being drunk created so many more hurdles, so he 'getting through' was just getting harder and harder.
I got the book on my kindle and started reading. On day 2 of reading, I had a huge argue ent with DP and went and got drunk.
I didn't know it at the time but that was my last drink. Next day, I carried on reading and haven't looked back.
The book recommended to keep drinking normally as you read, but by half way through the book, I'd already had enough and read enough to know I didn't want or need to.
Last drink was 31 March and I haven't missed it at all really. I've noticed times when I would have done it out of habit (such as this weekend - no kids, bank holiday etc) but I just didn't drink, and all was fine. Better than fine in fact!
No more arguments with DP - replaced with sober chat and discussions and solutions instead of emotionally and alcohol-fuelled rants!
No more hangovers. No more wobbling upstairs to put DCs and SCs to bed. More money in my bank. Better skin, no embarrassing regrets/paranoia, etc etc.
People have asked me in RL if I will ever drink again. The answer is I don't know. But at the moment, I firmly don't want to. I can see through to how I would feel the next day and it's not worth it.
I have been so social and recreational occasions and stayed sober and enjoyed it! (a first for me unless driving and miserable in previous drinking life!)
I realised during reading and also since that alcohol just doesn't need to be present in my life.
So I've done a month. That was definite. I'll probably now aim for 6 months. Then a year.
I'm enjoying counting up he days of freedoms rather than counting down the days of control before I'm 'allowed' to drink again.
That's the control alcohol has over you. Shitty when it's around you and shitty when you avoid it. Unless you change your mindset.
It's out of my life now so it has not control. I won't fall off the wagon as there IS no wagon 