The mind likes to roam often going into anticipation of the next moment. This is great in our everyday life for planning and getting excited about what is next to come.
However, we can get trapped in reveries about the future with our attention always a step or two, or even way way, ahead of us.
Attention when it is anticipating is attention that is not here now, not fully present to the moment at hand.
In meditation, as you notice the mind anticipating things to come, as your attention gets caught up in this, realize that even these thoughts of anticipation are happening now, not in the future, but right here in this very moment.
If we pause and catch the mind at its game, even anticipation can help us be more fully absorbed and present now!
The Every Day Yogi 