Meditation is simply focussing on your breath and using that to relax. It is not being thoughtless, it is more like slowing down those thoughts and trying to concentrate on the fluidity of your breath. It lowers stress, anxiety and also has many other more health benefits. 
You can start with a 1, 2 or 3-minute meditation. it does not have to be too much. Like in this video here https://www.mindbodygreen.com/0-24760/an-evening-meditation-to-destress-after-a-marathon-workday.html
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