How can I set up a mountain bike for optimal performance and comfort?

To set up a mountain bike for optimal performance and comfort, start by adjusting the saddle height to ensure proper leg extension while pedaling. Next, adjust the handlebar height and angle for a comfortable riding position. Check and adjust tire pressure for optimal traction and shock absorption. Fine-tune the suspension settings based on your weight and riding style. Lastly, ensure that the bike is properly maintained and regularly serviced to keep it in top condition.