Hi Sean, I was a functioning alcoholic too, and for a while I couldn't get my head around never drinking again. My doctor would talk about it and my mind would resist. But you can put that problem aside for now, until you feel stronger.
I think the most important thing for the first little while is to make plans to cope with the cravings. If you have any alcohol in the house, get rid of it (unless it belongs to someone else). Avoid any places or occasions that trigger your desire to drink, and divert yourself in some way towards the end of the day when you'd normally drink. Don't let yourself get too hungry or tired.
Look forward to the fantastic feeling when you wake up in the morning clear headed.