Living In The Present
Discipline your thoughts, focus on the present, not the past and not the future.
How to stay in the present:
If you ever find yourself losing attention; Use your fingers to feel different textures in your surroundings, it could be some paper, it could be a rock, maybe your wooden desk. Take the time to notice textures and their description.
This is one step to living in the present, if you find your mind wondering, force it to wonder into the present. Not your mind.