验证用户的email
Identify users with their e-mail address
将下订单的过程划分成几个大步骤（用户一次处理一个任务，尽量少的填写输入）
比如亚马逊的订单过程：
Login
Choose delivery address
Choose delivery options
Enter payment details
Review and submit the order
告诉用户他们在哪儿，将去哪儿
Tell users where they are and where they’re going.
不要让下订单过程不必要的复杂
Don’t make the ordering process harder than it needs to be
告知用户一般会产生的疑问
Address common user queries
强调必需填的选项
Highlight required fields
让下订单的过程灵活一些
Make the ordering process flexible
尽量让用户放松
Put users’ minds at ease
比如Tesco有一个告示去告诉用户在这里购物为什么是安全的：
可以让用户在下订单最后再次进行确认
Have users confirm their order before buying then provide confirmation
发送订单已确认的邮件
Send a confirmation e-mail
根据Jakob Nielsen’s Alertbox, December 8, 200312确认通知邮件应该：
简单
Be brief
告诉用户他们可能想知道的，比如订单号
Tell users what they are likely to want to know, such as the order number
应该象公司客服代表一样
Should be a real customer service ambassador for the company
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