First impressions are important and I understand that these emails can be nerve racking. Just email me like you would email a friend who you hope seeing again and it's all good. And please remember that the following info should be included in your first email in order to receive a reply:
Who you are: I am curious to get to know you! Write as little or much about yourself as you like but make sure to at least provide your full legal name, age and a few words on who you are and what you are looking for.
Verification: You may send 2-3 References (make sure you provide not just their names but their current website and email, so I won't have to search for that info) and/or employment information. Refer to details if unsure.
Where, when, what, how in all the excitement of first encounters please remember to tell me when you would like to meet me, where and for how long. Let me know which hotel you are staying at or if you'd like me to arrange for a place.