-Firts, you have to have clear your ideas, so then you can order your movables.
-After that, choose a combination of colors, like monochromatic (one color+neutral), analogous one color in diferent shades) or complementary two opposite colors).
-Finaly, don't overload the room with many showy derocations.
Here I give you some important tips.
Do you want a change in your room?
*If you have a small room, choose a light color, this will make the room visually bigger.
*If you are a person wholikes changing your room all the time, choose a neutral color and put decorations in anothers colors.