[header] How to curve a bowling ball [title] Start with the right stance and grip. [step] You want to be several inches from the foul line and preferably at least four steps away from your release. Some people take longer and that's fine--but at least four steps is ideal. 
Line your feet up with the arrow on the lane you are aiming for (which will depend on how hefty your curve is). [substeps] If you have your own ball, you probably know how to grip it.