I don't play a lot of games, but the ones I do play I play right to the end. Grand Theft Auto 4 is such a work of art. So:
It is well known that to bowl a turkey strike you must take two full steps to the left, then move the R-stick backwards and forwards in a perfectly straight motion. This is hard! How can you tell whether the motion really was straight? The analog sticks are very sensitive and even if you hit the "south" and "north" positions perfectly during your motion, you may wobble in between.
I found the secret was to hold the controller just underneath the edge of a hard, straight table edge, so that the analog stick touches the table edge and is prevented from moving off-centre - a bit like putting the rails on during a real game of bowling!
I got three strikes out of three as soon as I adopted this technique. If your hand isn't steady enough to hold the controller under the table edge at the right height, I suggest stacking books and paper, then holding the controller firmly at the correct height by pressing down on it. You'll do it!