Make the outside of your house look clean. Get rid of stained and dirty concrete driveways and patios. You can rent a pressure washer from a rental company or if a friend has one borrow it for a weekend. Remember different size pressure washers and different tips have have a stronger and weaker spray. When using one for the first time you need to test it out on an area that wont be noticed and hold it a couple of feet away from what you are spraying off. A pressure washer can damage and tear up surfaces if held too close.