Next time you see a position that is supposed to be winning: capture the position, transfer it to your favorite chess program, set the program at a rating higher than your own and play the winning position to see how to conclude the game. Then go back and repeat the exercise at an increased rating until you can win against it at full strength.
This is the position and move that Houdini found was winning in my last game post. I am playing against Shredder at full strength. After an initial failure, I can now systematically win the position.
A very interesting exercise that I highly recommend to my readers. Enjoy.