
There is only now, and when you crave, you become dissatisfied with the now; in that moment you prefer the reality of your idea to your experiential reality, and you suffer from this comparison. So when we act, if we are to be blissful, we don't compare the future to the present, the present to the past and assess that one is greater than the other, or how much greater each is than the other, that this state is 6 and this was 9 and this was 3 and that would be 11. There is only now, therefore we must exist mindfully. When we have a thought, we know it is just a thought. When we have a feeling, we know it is a feeling. When we imagine something, we know we are imagining. When we remember, we know we are remembering. Thus we experience the past and future only as movies playing on the screen of our minds; to long for them is to long to dive into the television screen. Everything that is worthy of appreciation exists not "inside" the screen, but here in the present moment. Movies should be a source of inspiration, never a source of suffering. This is why it is a mistake to crave.
As to how to practically stop craving, though, I'm not sure!