Summarize this article:

If you lift your head up, your vocal cords stretch with the movement and your voice may get strained faster. Your tone will likely be off and sound altered as well. To prevent this, always keep your neck straight with your head comfortably facing forwards. This is proper singing form. This also keeps your vocal cords relaxed, so you can hit all the high notes! Before you sing, straighten your back, and square your shoulders. Don’t overstrain yourself so you are uncomfortable, but support your diaphragm by standing straight and tall. Good posture results in good breathing techniques, which is crucial when singing like a professional.  If you don’t have proper posture, you may not be able to develop a full range of major and minor scales, for instance. Avoid being too rigid or stiff. You want to stand up straight, but don't lock your knees or constrict your muscles. To practice good posture, try standing against a wall or lying on your back while singing. To do this, use your abdominal muscles to breathe from your belly or diaphragm region. Inhale quickly and deeply, and then exhale slowly and steadily. This breath cycle allows you to let out rich notes with ease.  Singing with your lungs full of air helps you maintain your pitch and extend your notes for longer. Professional singers have superb air flow regulation, so they can bust out solos or sing 1 note for a long time. before you start to preserve your singing voice. Professionals take care of their voice to keep it in optimal condition. To do this, always start with a vocal warm-up before you sing. A warm-up is an exercise designed to prepare the voice and body for singing. You can do things like roll your lips and practice major and minor scales.  To roll your lips, relax them and blow air through your mouth to get them to vibrate. Then, change your pitch to stretch your vocal cords. This keeps you relaxed while still getting your muscles moving. There are countless warm-up video tutorials online if you need additional resources.

Summary:
Keep your neck straight when you sing so you can breathe properly. Maintain good posture to maintain proper singing form. Sing from your diaphragm to control your airflow. Warm up