Unless you can improve on what's already on the Net, make your company's ordering process similar to the best sites on the web. This avoids confusion because customers will be used to your system. Include a page for confirming orders and presenting customers with the final payment amount, including shipping. Once the customer has a password, the fewer clicks it takes to order, the better. You may add optional questions that enable you to collect useful marketing information about your customers.
Credibility is a major concern for Web users.