How many times have you considered a paint color from one of those tiny color samples? Its bad enough figuring out if you like it in the store under florescent lighting. And when you get home and tape it to the wall, it's still difficult to get a feel for whether you like it or not. Paint colors differ depending on the light in the room or the colors that surround them. I've chosen colors many times only to find them too orange, yellow or green.
Well, here's a plan to get a better idea of whether you like the color in the room or not, without painting a small section of the wall. Buy some 2'x3' construction paper, and several of those pint sized samples that Lowes sells in various shades of the color you're considering. Now you can paint the construction paper and tape it to the wall. You can move it to different places in the room or move it to another room that you're planning to paint. Hope this helps!