One of the small pleasures in chess is creating puzzles from our own games. In a way we try to immortalize those moments where our hard work in chess study meets up with the good fortune of fortuitously placed pieces.
Before I get to examples from my own games, I'll give a description of what makes a good puzzle. Every move of the winning side should be the best move in that position without ambiguity. If the puzzle is interactive, it's not necessary that each move of the opponent be the best defense, but the winning side must also be able to win against the best defense.
This puzzle comes from a casual game of blitz.