Positive thinking involves consciously choosing to focus on positive emotions and beliefs rather than negative ones. It can be practiced through daily exercises like replacing negative self-talk with positive affirmations, surrounding oneself with positive people and images, engaging in activities that make one feel good, and maintaining a sense of gratitude. While acknowledging challenges, positive thinking helps one look for opportunities for growth and solutions instead of dwelling on problems or past failures. Regular practice of positive thinking techniques can improve one's outlook and overall well-being over time.