Don't send your customer away until your have your sale. Check all linked sites regularly, to make sure they still exist, and don't compete with your site. Open an additional browser window, when appropriate. An astonishing number of sites do NOT have the company name in searchable text. Your product or service should also be found by a search engine.
Good printing requires high contrast between text color and background color or pattern.
Remember, most browsers do not print the background when asked to print a site. Essential graphics must not be on the background.