People need to be able to find you quickly. We all want instant gratification. And why not? While you have to build trust before visitors will buy, Amazon has taken the sting out of online purchases. You can sign up for their Associate Program, and build an online store, and let Amazon do all the work. Commissions suck, but if you are an expert is some physical products, you can direct your readers to Amazon to make a purchase. The trust factor for Amazon is as high as a retailer can get. You can even set up a deal where Amazon will distribute your own physical products that you price however you want. And of course, Kindle is taking over publishing. For a new author, there may be no better way to distribute your book.