Read a lot about the golden number, see examples, check it in real life. The golden number is a relationship number. In art, everything has a meaning only in relation with something else. A white dot in the center of a black backgroud means everything. A white dot in the center of a white backgroud means nothing. The white dot remains the same, but the relationship with the background changes everything. Just buy a book with examples of golden number or golden ratio in nature. Then try to apply it to your compositions and designs. Not for nothing Feng Zhu always says he likes to have 3 of everything. Nothing beats nature, the best art always have a resonance with nature, even if you know it or not, even if the artist know it or not.