If your desk and house is clean, then you can focus your attention on your business. Get out of the house for awhile, and away from the computer. Breath some fresh air while taking a nice walk. If you don't take care of yourself, you won't be motivated to do much in any aspect of your life. Take a different approach to your advertising.
New ideas are the key to selling.
Plus, it will help you get excited about it again. Be kind anyway. If you are honest and frank, people may cheat you - Be honest and frank anyway. What you spend years building, someone could destroy overnight - Build anyway. Give the world the best you have, and it may never be enough - Give the world the best you've got anyway.