View Rule of Thirds
The Rule of Thirds applies to both composition and color. In composition, breaking up the canvas of an image into thirds both horizontally and vertically, placing your points of interest at the intersections of these imaginary lines, when done properly, will yeild a more interesting compostion, and one that is easier to “read.” In color, if you break down your composition of colors into warm, cool and neutral, you can then limit elements of your composition into these categories of color to further push to mood intended with your color palette.
The whole point of using these rules is to break up the compostion into stronger and weaker elements, rather than conforming to a uniformity, which is essentially boring (and a common tendency of beginning artists). You’ll note that as you develop a sense for using this rule as a basis, your compositions will become more pleasing to your eye and others.