My normal practice session goes like this:

8 or 10 shots to line up, loosen up.

a game or two of low ball - 20 being the perfect score.

Or I will do a spare drill - shoot the 10 till I get it, then the 6, then the 3, then the head pin, then the 2, then the 4, then the 7. Perfect score - 7 (one try each)

After the spare drill, the lane becomes 35-40 feet long for a while, when I work on targeting a shot I don't normally play - 5th arrow, twig, whatever I feel like. Sometimes I get real energetic, and play around with lining up in front of the ball return.

While I'm doing the above, or after, I play around with hand positions/releases/follow through changes.

Then, and only then, I bowl a game or two for score. When I'm doing that, I ALWAYS shoot my spares.

And - when I'm practicing, I make sure I stay hydrated - I only drink WATER.

Then I dry off, and go home and take a shower.

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One advantage of bowling over golf

is that you seldom lose the ball.