Dilemma — The company bowling tournament is coming up, and the winner gets an extra grand in his or her bonus this year. You want it — bad — but right now you can barely keep the ball out of the gutter.
Solution — Take an iron — yep, the one you use to press your shirts — to the bowling alley and practice pointing the end of it at the second arrow from the right on the lane as you make your approach.
Why this works — This angle positions you perfectly for a dead-center throw. When you repeat this motion with the ball, you get the angle down pat before you factor in the weight and awkwardness of the ball.
There is also a series of urawaza videos online.
The "Ice Cream Yo-Yo" is an example of an urawaza.