Take it slow when you are winning!
This was a game I lost when I was in a winning position. I remember I drew a tournament game when I was in a completely winning position.
The reason I lost and drew those games were because I got overconfident and wanted to get the game over with.
You need to take it slow when you are in a completely winning position. I shall quote Lasker here:
"The hardest game to win is a won game."
Here is my game, Hope you like it and that you could take something from it.