In a letter to discover not allow yourself extra liberties, even if in real life, you do not avoid them completely. Your main task now - the most interest is human. And as long as you do not feel out how he can react to a particular word or phrase to the person better not to go.
Write a letter to "certain" rights. Even if you do this for multiple recipients. Template messages will be felt immediately, and are unlikely to meet. To show their relationship to the person and their interest in him, lean on some of his personal data and mention this in the letter.
Questions - an important part of the first message. Consider them separately. Ask just something neutral, and deep personal life do not climb. And of course the dose amount of these issues.
It is also necessary to give brief information about yourself. Write whatever you see fit. But do not overdo it. Psychologists have a theory that you need to leave the travelers at the peak, at a certain moment of understatement that was still a reason and a desire to meet again. It is the same with the letter. Do not immediately spread to all the information. Leave interlocutor place for creativity and the imagination. Again embellish too is not worth it. Sooner or later you will meet. And your partner may be unpleasantly surprised to distinguish the original from what he had imagined from your descriptions.
Ideal first letter fits in just two pages of handwriting. More - already too much. The person with whom you want to meet you, may just get tired of your verbal outpourings and answer you.