Many use pressure washers for washing their cars, especially the underside of it. But there's also other ways to use it to clean your surroundings.
Take for example, your garage. You can get rid of all the muck and grime and grease very easily by using your pressure washer. It's also great for playground equipment that you have to clean once in a while, especially those puzzle foam mats. Maybe you can even use it to clean roofs and gutters and you can use it on your walls as well. They're also handy to use on sidealks and clearing away sand on beach homes.