Add colorful throw pillows to any space, living room, den or back patio. Paint an accent wall. Colors like hunter green and powdered blues and sage green are very popular choices this season. If you cannot afford to tile your patio flooring, consider painting the concrete flooring in a neutral color. (Be sure to get advice on the best types of paint used for concrete flooring.) Visit flee markets etc where you can find affordable wall art pieces. Go to yard sales or re-upholster existing furniture.