to go right in life we should do meditation and mantra jap so tell me which mantra to repeat

You are correct that meditation (dhyana) and mantra japa (repetition of sacred sounds) are important aspects of Lord Shiva’s teachings for attaining inner peace, clarity, and righteousness in life.

A highly revered and powerful mantra for Lord Shiva is the “Maha Mrityunjaya Mantra”. It is as follows:

ॐ त्र्यम्बकं यजामहे सुगन्धिं पुष्टिवर्धनम्।
उर्वारुकमिव बन्धनान् मृत्योर्मुक्षीय माऽमृतात्॥

Transliteration:
Om Tryambakam Yajamahe Sugandhim Pushtivardhanam
Urvarukamiva Bandhanan Mrityor Mukshiya Maamritat

This mantra is known for bestowing health, longevity, and spiritual upliftment. Chanting this mantra with devotion and focus helps in overcoming obstacles, fears, and leads one towards the right path in life.

Another simple and powerful mantra is the Panchakshari Mantra:

ॐ नमः शिवाय
Om Namah Shivaya

This is the fundamental mantra dedicated to Lord Shiva. It can be repeated silently or aloud during meditation. Its regular chanting purifies the mind, brings peace, and aligns the practitioner with Shiva’s divine energy.

Practice:
- Sit comfortably with a straight spine
- Close your eyes and focus on your breath
- Repeat either of the above mantras sincerely, as many times as you wish

May Lord Shiva bless you on your spiritual journey.