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 (i.e. +2.83 at depth 21) in my last game post. Move #36 with White to play. I am playing against Shredder at full strength. Houdini thought that White's next move should be Bxh6, however the move I made wins nicely.
A very interesting exercise that I highly recommend to my readers. Enjoy.