促销信都是“不请自来”，所以开头一定要有吸引力和诱惑力。It must make an appeal to some particular buying motive and may begin with a question, and instruction, a quotation or an attention-grabing short story. Sometimes if required, it may even begin by suggesting the very opposite to what you want. 看看下面这些开头是怎么写的：
1) Would you like to reduce your rising domestic fuel costs?
2) Why not enjoy the colorful spring by joining the flying Horse Tourist Group after a completely busy winter?
3) Just imagine how comfortable you are when you stretch out those tired limbs on our newly developed White Cloud water bed.
Our recent researches and tests have showed that rooms with our newly developed Energy Savers stay warmer and require 20 percent less fuel than those rooms of the same size without the usage of the savers. The new savers are popular because they are able to store and reflect heat in a much more efficient way. Read the enclosed brochure, you will find that the self-stick backing makes them easy to install yourself.