spares are the most importent thing to work on u might be able to through a heck of a strike ball but if u cant pick up a spare ur not gonna win...trust me i know. just last week i was bowling in a tournment and shot a 632 and it put me in 3rd place the guy that beat me shot a 659 and i would of placed 2end if i had have not opend in the first 3 frames of my last game that could have made a huge diffrence in advancing to the state finals