Meditation is a natural relaxation state of the mind. To me, it is the most important
mental exercise to practice during our lifetime. Meditation is actually our natural state.
Mindfulness can be practice all the time by simply focusing on the current moment, not yesterday or tomorrow but the present moment, paying attention to what you are doing, being aware of your thoughts.
The proper way to meditate is just start. You will develop a practice over time but start with what works for you. Sitting in a chair or floor with good posture, close your eyes, take 5–10 slow deep breaths, following your breath. Your relaxing your mind so try not to think of anything. Just focus on a point in the front of eyes. You will find your thoughts drifting to problems just bring the focus back to the point in front of the eyes. The time you meditate is up to you.
What I just described is the first step of Dzogchen, an esoteric tradition of teachings considered to be the highest and most definitive path to enlightenment by Tibetan Buddhism. Buddha found enlightenment with the breath sitting under a tree. So with the will and wisdom, Dzogchen becomes an incredibly profound and effective method for achieving enlightenment for the benefit of all beings. The fundamentals of Dzogchen meditation 
can be found here, and even may be the most powerful meditation technique.
Make meditation part of your life and you will see the world anew.
That a great introduction. Thanks.
Thank you professor for reading and commenting.