Use Actual Paint Samples, Not Chips
It's difficult to tell what a color is going to look like on your wall from a small paint chip, so many manufacturers offer sample containers of their colors. Depending on the manufacturer, you can buy sample containers in quarts, pints or even smaller sizes, and they range in price from $3 to $8. They're a wise investment that will prevent you from wasting money on a color that isn't right. And because colors can change dramatically under different lighting conditions, instead of rolling the sample onto the wall, roll it onto white tagboard.You'll be able to move the sample around and view it under all the different lighting conditions in your home.
Paint Family Color Collections are Invaluable
Paint companies have gone to a lot of trouble (and spent a lot of money) grouping colors into “families” and “collections” and “concepts” and “schemes.” Basically, these are combinations of complementary colors that may not occur to you until you see how well they work together. Take advantage of all the research already done for you by color experts. Find brochures at paint stores and go online to paint manufacturer websites, houzz.com and Pinterest, where you'll find hundreds of examples of interior and exterior paint color combinations.