Mantras are tools for concentration and setting of intentions.

Some mantras you will hear:

SAHA NAAV AVATU

Om Saha Naav[au]-Avatu
Saha Nau Bhunaktu
Saha Viiryam Karavaavahai
Tejasvi Naav[au]-Adhiitam-Astu Maa Vidvissaavahai
Om Shaantih Shaantih Shaantih

Om, Together may we two Move (in our Studies, the Teacher and the Student),
2: Together may we two Relish (our Studies, the Teacher and the Student),
3: Together may we perform (our Studies) with Vigour (with deep Concentration),
4: May what has been Studied by us be filled with the Brilliance (of Understanding, leading to Knowledge); May it Not give rise to Hostility (due to lack of Understanding),
5: Om Peace, Peace, Peace.

OM SARVESHAM SWASTIRVAVATU

Om Sarveshaam Svastir-Bhavatu |
Sarveshaam Shaantir-Bhavatu |
Sarveshaam Purnnam-Bhavatu |
Sarveshaam Manggalam-Bhavatu |
Om Shaantih Shaantih Shaantih ||

Meaning:
1: May there be Well-Being in All,
2: May there be Peace in All,
3: May there be Fulfillment in All,
4: May there be Auspiciousness in All,
5: Om Peace, Peace, Peace.

Sat Nam is true identity. ‘Sat‘ meaning truth and ‘Nam‘, identity. Sat Nam is in the sacred language of Gurmukhi: ਸਤਿ ਨਾਮੁ. Sat Nam is the mantra that is most widely used in Kundalini Yoga practice. This is a seed (Bij) mantra, and within this seed is contained all the knowledge of the fully grown tree.

SAD GAMAYA

Om Asato Maa Sad-Gamaya |
Tamaso Maa Jyotir-Gamaya |
Mrtyor-Maa Amrtam Gamaya |
Om Shaantih Shaantih Shaantih ||

Lead me from the ignorance to truth.
Lead me from darkness to light.
Lead me from death to immortality
Om Peace Peace Peace.

ASHTANGA OPENING CHANT

Om
Vande Gurunam Charanaravinde
Sandarshita Svatma Sukava Bodhe
Nih Sreyase Jangalikayamane
Samsara Halahala Mohashantyai

Abahu Purushakaram
Shankhacakrsi Dharinam
Sahasra Sirasam Svetam
Pranamami Patanjalim
Om

om

I bow to the lotus feet of the Supreme Guru
which awaken insight into the happiness of pure Being,
which are the refuge, the jungle physician,
which eliminate the delusion caused by the poisonous herb of Samsara (conditioned existence).

I prostrate before the sage Patanjali
who has thousands of radiant, white heads (as the divine serpent, Ananta)
and who has, as far as his arms, assumed the form of a man
holding a conch shell (divine sound), a wheel (discus of light or infinite time) and a sword (discrimination).

ASHTANGA CLOSING CHANT

Svasthi Praja Bhyaha Pari Pala Yantam
     Nya Yena Margena Mahim Mahishaha
   Go Brahmanebhyaha Shubamastu Nityam
    Lokah Samastah Sukhino Bhavantu
   Om Shanti Shanti Shantihi

May the rulers of the earth keep to the path of virtue
For protecting the welfare of all generations.
  May the religious, and all peoples be forever blessed,
  May all beings everywhere be happy and free
   Om peace, peace, perfect peace

AAD GURAY NAMEH

Aad Guray Nameh
Jugaad Guray Nameh
Sat Guray Nameh
Siri Guroo Dayvay Nameh

I bow to the Primal Wisdom
I bow to the Wisdom of all the ages
I bow to the True Wisdom
I bow to the Great Invisible Wisdom

(Brhadaranyaka Upanishad — I.iii.28)

PEACE MANTRA  – SHANTI PATH

Aum dyauḥ śāntirantarikṣaṁ śāntiḥ
pṛthivī śāntirāpaḥ śāntiroṣadhayaḥ śāntiḥ
vanaspatayaḥ śāntirviśvedevāḥ śāntirbrahma śāntiḥ
sarvaṁ śāntiḥ śāntireva śāntiḥ
sā mā śāntiredhi
Aum śāntiḥ, śāntiḥ, śāntiḥ
=Yajurveda 36:17

PEACE MANTRA – SHANTI MANTRA -TRANSLATION

May peace radiate there in the whole sky as well as in the vast ethereal space everywhere.
May peace reign all over this earth, in water and in all herbs, trees and creepers.
May peace flow over the whole universe.
May peace be in the Supreme Being Brahman.
And may there always exist in all peace and peace alone.
Aum peace, peace and peace to us and all beings!

GAYATRI MANTRA

Om Bhur Bhuvaḥ Swaḥ
Tat-savitur Vareñyaṃ
Bhargo Devasya Dhīmahi
Dhiyo Yonaḥ Prachodayāt

General meaning: We meditate on that most adored Supreme Lord, the creator, whose effulgence (divine light) illumines all realms (physical, mental and spiritual). May this divine light illumine our intellect.