aim the cue ball for a straight in shot to the corner pocket at about the first diamond behind the string of object balls, starting with object ball number 1. keep in mind that as your aim becomes more true you can always increase the distance by moving the cue ball further back.
using a straight-in placement and aim with each new shot, proceed to pocket the 2-ball through 8-ball into the same corner pocket in which you shot the 1-ball. then, using the same aim and placement, pocket the 9-ball through the 15-ball into the other corner pocket, making sure each new shot is straight-in.
this drill may sound easy enough, 