Strike a solid preparatory position. Move into a stable fourth position with your weight centered between your front and back feet. Ensure that your knees and feet are fully turned out, that your head is aligned with your shoulders and that your tailbone is not tilted backward.
Bend both knees equally in demi-plie, pressing your heels firmly into the floor. Resist rising up onto your supporting leg or lifting your working leg before you hit the deepest point of your demi-plie. Your knee bend will help to power your turn.
Engage your core muscles, imagine pulling your ribs slightly inward and shift your weight slightly onto your supporting leg as you enter into your turn. Fully straighten your supporting knee as you rise onto demi- or full-pointe and transition into your turning position quickly and deliberately. Move your working leg directly into position, whether you plan to hold it in passe, arabesque or attitude.
Focus on lifting the working foot while keeping the hip of the working leg pressed down. Find your new center over the supporting foot. Use your torso to propel you around and think of your turn as one continuous spiral into the floor.
Relax your head and neck for better spotting. Fix your gaze on a particular spot just above eye level and lock onto the spot with every revolution. Avoid dropping or raising your chin excessively or risk losing your alignment.
Use your arms. Keep them level with your sternum and pull them in slightly from first position to engage the back muscles. Bring your arms closer to your body as you enter into a third or fourth turn, as drawing your arms toward your chest increases speed and momentum.