Hold the trombone with your left hand
Place your left hand around the brace near the mouthpiece section
Rest your left thumb on the thumb rest if there is one
Wrap your left fingers around the slide brace or hand grip
Keep your right hand free to move the slide
Support the instrument so it feels balanced and steady
Keep the bell pointed slightly forward
Keep your wrists relaxed
Keep your shoulders relaxed
Hold the instrument close enough to your body for control
Keep your slide hand loose and ready to move smoothly