Building confidence as a teenager is an important journey towards self-discovery and personal growth. Here are ten pieces of advice to help you on your path to building self-confidence:

1. Embrace self-acceptance: Accept yourself as you are, recognizing your strengths, weaknesses, and unique qualities. Understand that everyone has their own journey and comparing yourself to others is counterproductive.
2. Set achievable goals: Break down larger goals into smaller, manageable tasks. Accomplishing these smaller tasks will give you a sense of achievement and boost your confidence.
3. Step out of your comfort zone: Challenge yourself to try new things and take risks. Stepping out of your comfort zone allows you to grow and learn, building confidence in your abilities.
4. Practice self-care: Take care of your physical and mental well-being. Get enough sleep, eat nutritious meals, engage in regular physical activity, and practice activities that bring you joy and relaxation.
5. Surround yourself with positive influences: Surround yourself with people who uplift and support you. Seek out friends, mentors, or role models who inspire and encourage your growth.
6. Develop your strengths: Identify your talents and passions, and invest time and effort in developing them. By becoming proficient in areas you excel in, you'll gain confidence in your abilities.
7. Practice self-compassion: Treat yourself with kindness and understanding. Acknowledge that mistakes and setbacks are part of life's journey and an opportunity for growth.
8. Challenge negative self-talk: Replace negative thoughts with positive affirmations. Focus on your strengths, accomplishments, and the progress you've made rather than dwelling on perceived failures or shortcomings.
9. Improve your communication skills: Effective communication is essential for building confidence. Practice expressing your thoughts and opinions clearly and respectfully, both in personal conversations and public speaking.
10. Seek opportunities for personal development: Engage in activities that align with your interests and passions. Join clubs, organizations, or classes that allow you to learn new skills, gain experiences, and build your confidence through accomplishments.

Remember, building confidence takes time and effort. Be patient with yourself and celebrate your progress along the way. With consistent practice and a positive mindset, you can develop the self-assurance you desire.