1. Paint a sample on the wall. A big sample. Let it dry, sit and look at it. Walk away for a while, then come back and look at it again at different times of the day. The lighting in the room will change the way you perceive the color as the sun shines differently throughout the day.
5. Try Pintrest or other online sites for examples of room colors that you like. Designers get paid big bucks to pick out those color schemes. If they are willing to share their ideas, be willing to take them.
6. Decide what you will be doing in that room. What sort of tone are you trying to set in the space. Is it a calm and inviting space like a bedroom? Or more active like the kitchen? Darker colors work best in places like a media room. If you are going for a burst of energy and excitement, choose colors that are complementary. If you aren't sure what colors are complementary, check out a color wheel. Many of these are easily accessible online through a simple internet search.