How did Claude Monet paint his paintings?

Monet painted in the Impressionistic style and the majority of his works were done 'en plein air' or outdoors on the actual site, painted quickly from direct observation. Refer to his paintings of Haystacks, Cathedrals, and the water lily series. Monet captured the color of light at different times of the day in a way no other artist had. He used oil paints, watercolors, pastels.