There are all these self-proclaimed meditation teachers that make a mixture of meditations, and keep it at a superficial level, promoting meditation as a way to feel happier, blissful, and less stressed. They usually teach bare attention, mindfulness and insight, in the wrong way.
You have to be careful because practicing meditation in this way is only going to lead you to get attached to peace, bliss, and happy feelings. Buddha, the greatest meditation teacher of all times, teaches us not to waste our time dwelling on the bliss and peace of a concentrated mind which is achieved through tranquility meditation, but to move forward to the analysis and uderstanding of reality with the practice of insight meditation or Vipassana.
Now, watch out! there's another big misunderstanding in our present world. Lots of people are skipping the necessary practice of tranquility meditation to go directly into insight meditation. The problem is they are just practicing bare attention instead of vipassana or insight meditation. Why are they doing this? Mainly because they have bad meditation teachers.
Bare attention can be useful, sure, it's better to be paying attention than being distracted. In the same way, the "be here now" instruction taught by all these new age teachers can help you be more present and less stressed. But mindfulness, is much more than that and vipassana is even more than bare attention as well.
First we need to have a good foundation on ethics, so, we need analitical meditations that help us work with anger, attachment, ignorance, pride and jealousy, and that help us cultivate compassion, loving-kindness, patience, etc. With these as a base we practice tranquility meditation to develop a concentrated peaceful mind but not just for 20 minutes a day!. Our goal is to achieve samadhi (highly focused attention), and then we don't just hangout in that peaceful focused space but we continue to develop wisdom through our practice of insight meditation.
So, don't follow those people who believe that bare attention is all there is to meditation. Study, reflect and then meditate wisely.