After finding the right width, grip the bars or handles firmly and push yourself up. As you lower keep your elbows and wrists stacked above each other and elbows tight to your sides. Brace both the butt and the abs. Once there, drive yourself back to a solid dip support without arching your back or letting your elbows flare out. If the weight is too much and you cannot stop yourself from either arching your back or elbows flaring out.