That's the essence of mindfulness meditation (the technique used in the paper). There's a completely different school that requires the use of mantras like "om" etc. Transcendental meditation is an example of a mantra-based technique. For myself, I find the mindfulness approach more useful and grounded than the mantra approach. There are also more active techniques such as tai chi, qi gong and yoga but they only qualify as "meditation" if they're done with a very conscious and meditative mindset.