Golden Mean or Simple Grid?

Recently I got turned on to a better understanding of the Golden Ratio, Golden Mean, Golden Section. These are all popular names for a mathematical concept which expresses the relationship of two parts of a whole with each other and with the whole. The resulting proportion (Divine Proportion, 1:1.618) is found everywhere in nature and the universe. No wonder architects, artists, musicians, scientists use this ratio in their work.
Like many artists, I often divide a space into thirds vertically and horizontally. This simple grid is easy and efficient. The cross points on the grid are “sweet spots” for placing important elements.
I’ve learned that some artists apply the Golden Ratio in a similar way when placing the strongest elements in their artwork. When appropriate, I’m making an effort now to do that too. If it was good enough for Leonardo da Vinci, why not give it whirl?