I've been doing these daily exercises below for several weeks now and have noticed a marked improvement in my finger strength and rev rate. Just thought it'll be useful to let some of you guys know (especially those who, like me, are not blessed with big hands, long fingers or a strong wrist).

*Finger-tip strength training*

Get a few THICK rubber bands and hang them on your bowling fingertips. Using the fingers of your non-bowling hand, stretch the rubber bands downwards until you can feel a *moderate* amount of resistance. Now rest/hang your bowling thumb (the flat/palm side) on the edge of a table and lift with your fingers. This should simulate the weight of the ball hanging on your fingertips when you release the ball and help train your finger muscles.

Be VERY careful with this exercise. Do not overwork your finger tips... especially for those who had tendon/ligament injuries before, and go easy on the ring finger since it is usually weaker than the middle finger. If you want more resistance, just add additional rubber bands to each finger.

*Wrist wripper/Weight Roll*
http://www.wristripper.com/how.html
Don't spend you money on that. Make your own. Just make sure you get some tough rope/string and tie AT LEAST 13lbs of weight onto it for maximum effectiveness. Remember to go slow when rolling the weight down. Just 5 'cycles' with a 13lb weight and my forearms were burning already. Very effective imo.