Meditation for focus and concentration help to make your life easy and meditation also increase productivity as well as clarity in thought.  

Mindfulness means being present at the moment. In our thoughts we just spent 40% of our time in the present, rest in past or future thoughts. Mindfulness practice will help to be present at every moment of time. In mindfulness practice, just flow with your environment.  

Transcendental Meditation a 'mantra' is chanted while doing this and the mantra is given by his/ her guru or master. Mantra is just some series of words. Mindfulness meditation and focus mediation and this is also called open awareness meditation. 

Here you just focus on your breathing, the sensations in breathing, and whenever your mind wanders just softly shift your focus to breathing again. Just be present with your breath. It will help to overcome negative thinking and overthinking. This Video is small guide meditation for you, to find which type of meditation  helpful for you.