1. Feature benefits.
2.Be creative and stand out from your competition.
3.Under promise and over deliver
4.Use graphics and color to enhance your copy.
5.Do not print headlines or subheads in hard-to-read text.
6.Be consistent with your business image and logo recognition.
7.Make it easy for recipients to respond.
8.Carve your mail date in stone and plan well in advance.
9.Make an offer that can't be refused.
10.If sending a letter always add a P.S. If your readers don't read any-thing else,they are likely to read the P.S.