"Yogas chitta vritti nirodhah" "Yoga is the calming/cessation of the fluctuations of the mind." Yoga Sutra 1.2

"Yogas chitta vritti nirodhah"

"Yoga is the calming/cessation of the fluctuations of the mind." Yoga Sutra 1.2

5 Ways to practice chitta vritti nirodhah

1. Sama Vritti Breath -- Breaths in equal length, counting inhale and exhale, trying for an even breath count (but not trying too hard)
See an explanation here https://www.yogapedia.com/definition/8594/sama-vritti

2. Parivrtta Poses -- Revolved/ Twisting Poses

Focus on coming out of the twist with ease from vritti to calm and steady.

Parivrtta Janu Sirsasana   Revolved Head to Knee

Parivrtta Parsvakonasana  Revolved Side Angle

Parivrtta Sukhasana   Revolved Easy Pose

Jathara Parivartasana Revolved Belly Twist/ Knee Down Twist  and More Twists
Parivrtta Trikonasana  Revolved Triangle
Parivrtta Ardha Chandrasana  Revolved Half Moon

I also like Garudasana / Eagle Pose/ Remover on Obstacles for calming Vritti as well 

3. Yoga Nidra, yoga sleep.

Nidra is one of the Chittas. The other four are thoughts based on reality, misconceptions, imagination, and memories.

See a guide here http://www.yogajournal.com/article/practice-section/10-steps-of-yoga-nidra/

4. Meditation and Mantra

Mantra means mind training. Using a Mantra, a saying like So Hum (That I am) or Om can help connect the mind to the breath and help clear the mind.

See Psychology Today How Mantras Calm Your Mind : Repeating simple words can wind down your brain's default mode.

5. Drishti -- Gaze Literally focus the mind.

See More Clearly By Practicing Drishti