Instructions
Position your Mii three-quarters of the way to the side. The side will depend on either if you are right handed (go to the right side) or left handed (go to the left side).
Angle your bowling ball's path towards the left if you are right handed, aiming for the center pin. If you are left handed, you will be on the left side so aim towards the right, also at the center pin.
Throw the bowling ball. Make sure you are slightly late on the throw to minimize the ball's spin factor by releasing the B-button as you start raising the Wii remote to follow through on the bowling swing. Too much spin may lead to a non-strike hit, or even into the gutter.
Modify any changes in your throws to fit your style such as starting position, aim and spin. There is no exact science in Wii bowling, only that a strike will depend primarily on how you hit the center of the pins from the front row. For the most part, staying on the opposite side of your throwing hand is vital to success.