I used the 'now' concept when I started reading Tolle and learning about mindfulness, living in the present moment, based on the concept of the eternal now. 'Now' is the only time in which anything happens, the only moment over which we have any control. So, in keeping with that, I vowed to 'never now' drink, focusing my awareness and intent to a brilliant point of ultimate power and resolve.
As I have become comfortable with that, I am finding it useful again to consider the eternal forever nature of my commitment. It is useful because of how it helps to further expose my AV, and because of the comfort and peace it gives.