Put down theone color that excites you the most, then the next, relating it to the first. This is the relationship that excites you the most. Then the third color, relating it always to the whole. You are emphasizing what interest you and minimizing other things by putting them in the service of your true passion and leaving out altogether what distracts. Keep it simple.
In painting you never do what you set out to do. Something else happens. If it always turns out right you are probably doing something wrong.
Do not try to make a picture of something. Make something.