Living in peace, harmony, and tranquility with others is essential. Here are some guidelines from the Quran and the Prophet Muhammad's (SAW) teachings:

I. Treat Others with Kindness and Respect
1. Smile and greet others: A simple smile and greeting can go a long way in building positive relationships (Prophet Muhammad, SAW).
2. Be courteous and polite: Treat others with respect, using good manners and polite language (Quran 3:159).
3. Show compassion and empathy: Be kind and understanding towards others, especially those in need (Quran 42:37).

II. Foster Positive Relationships
1. Be a good neighbor: Treat your neighbors with kindness, respect, and consideration (Prophet Muhammad, SAW).
2. Build strong family ties: Nurture positive relationships with your family members, showing love, respect, and care (Quran 4:1).
3. Cultivate friendships: Surround yourself with righteous, supportive friends who promote positive values (Quran 4:69).

III. Promote Peace and Harmony
1. Avoid conflict and arguments: Strive to resolve disputes peacefully, avoiding arguments and conflict (Quran 8:46).
2. Be a peacemaker: Act as a mediator to resolve conflicts and promote peace (Prophet Muhammad, SAW).
3. Forgive and let go: Practice forgiveness and letting go of grudges, promoting a peaceful and tranquil environment (Quran 24:22).

IV. Respect Diversity and Differences
1. Celebrate diversity: Recognize and appreciate the diversity of cultures, backgrounds, and beliefs (Quran 49:13).
2. Avoid prejudice and bias: Treat others with fairness and justice, avoiding prejudice and bias (Quran 4:135).
3. Focus on shared values: Emphasize shared values and common humanity, rather than differences (Quran 3:64).

V. Cultivate Patience and Understanding
1. Practice patience: Develop patience and understanding when dealing with others, recognizing that everyone has their own struggles (Quran 2:153).
2. Seek knowledge and understanding: Strive to understand different perspectives and cultures, seeking knowledge and wisdom (Quran 96:1-5).
3. Reflect and self-reflect: Regularly reflect on your own actions and intentions, recognizing areas for improvement (Quran 3:190-191).

By following these guidelines, you'll be well on your way to living in peace, harmony, and tranquility with others. Remember, promoting positive relationships and a peaceful environment is a collective responsibility. May almighty Allah continue to strengthen us in every aspect of our lives with what He likes and approved.