2. Color in your scene
Your image will have inherent color based on the time of day and subject you are shooting. If you are shooting a forest, your scene might be predominantly green, if you are doing a seascape, there may be lots of blue because of the colour of the water.
Be aware of the colour in your scene and work with the opposite colors on the visual colour wheel. As an example, there are three primary colors that your camera sees, they are: Red, Green and Blue. The additive colors (opposite colors) are Cyan, Magenta and Yellow. To be clear, Cyan is the opposite color to Red, Magenta is the opposite to Green and Yellow is the opposite to blue. These opposing colors can work well in a scene, particularly yellow and blue.
Look at the colors in your scene and decide what you want to emphasize. To make sure you have great colours to work with, you will want to shoot during the golden hours and emphasize the warm colors.