MINDFULNESS means paying attention in a particular way: on purpose, in the present moment, and non judgmentally.” -  Jon Kabat-Zinn. 

It is Focusing attention to THIS present Moment.  Letting go of the past.  Letting go of the Future.  And just paying attention to whats happening NOW.  Not a day, a week, an hour, or even a second before or after.

Try it.