Personal stationery can say a lot about you, advertising your attention to detail and love of the finer things in life. It will endow your communications with gravitas, and ensure that they are given the recipient's full attention.
Even if you are not prepared to invest in your own stationery, you can at least eschew cheap, low-quality stocks, which smacks of carelessness and indifference.
Equipped with quality paper, envelopes and correspondence cards, you will at least look as if you have taken some trouble.
For a comprehensive guide to addressing people with titles, as well as other correct forms of address, please click here