After finding the right width, grip the bars or handles firmly and push yourself up. Squeeze your butt and abs while pointing your toes and keeping them slightly forward of the hips. The shoulders should remain back and elbow pits forward at the top. Avoid crossing the ankles, moving into extension or bending your knees behind you.
As you lower keep your elbows and wrists stacked above each other and elbows tight to your sides. Use your feet to control the descent. Work to keep tension throughout the body all the way to the bottom. Once there, drive yourself back to a solid dip support without arching your back or letting your elbows flare out.