The ego will find a way to trap the mind in a bubble of negativity and misery. It is easy to fall into the trap. Awareness of our surroundings can help center us back to the moment. Always strive to be in the present. It is not an easy task, but it is very beneficial for our well-being, peace of mind, and sanity to try. Living life to the fullest is being present in the moment.
Psychology of Mindfulness 